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​​​​💻 Know About Company 💻

Name :Audi
Type : Public
Industry : Automotive
Founded : Historic - Zwickau, Germany (25 April 1910); Modern-era - Neckarsulm, Germany (1 January 1969)
Founder : August Horch
Headquarters : Ingolstadt, Germany
Area served : Worldwide
Key people : Rupert Stadler (Chairman of the Board of Management), Marc Lichte (Head of Design), Ulrich Hackenberg (Head of Technical Development)
Products : Luxury vehicles
Website : www.audi.com

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​​​​​​🔰 Know About Country 🔰

Country: Bolivia
Capital: Sucre
Language: Spanish, Quechua
Continent: South America
Currency: Bolivian Boliviano (BOB)
Area: 1098581km²
Population: 11217864
Density: 10.2/km²
Calling Code: +591
Internet Domain: .bo

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​​745. What is a Neodymium Magnet?

A neodymium magnet (neo-magnet) contains neodymium, iron and boron amongst a few other elements. It is the strongest type of magnet commercially available. Even small neodymium magnets have a large amount of magnetic force and are capable of lifting more than 1000 times their own weight.
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746. Why does garlic give you bad breath?

Garlic contains a chemical called allyl cysteine sulphoxide or ‘alliin’. When a raw garlic clove is crushed or chopped, an enzyme in the garlic cells is released that reacts in a matter of seconds with the alliin to produce a chemical called allicin. This breaks down into lots of other chemicals, most of them stinky.
Nearly all of these chemicals are broken down in your stomach and liver, but allyl methyl sulphide is one that survives to be absorbed into the bloodstream intact. This means that it can diffuse out through your lungs into the air you exhale for up to two days. Brushing your teeth has only limited effect because the chemical is still in your blood.
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​​​​💻 Know About Company 💻

Name: Jio
Industry : Telecommunications
Founded: 2010
Area: India
Founders:  Mukesh Ambani
Products: Mobile Telephony, Wireless Broadband
Headquarters: Navi Mumbai, Maharashtra, India.
Parent: Reliance Industries
Website: www.jio.com

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​​​​​​🔰 Know About Country 🔰

Country: Bosnia and Herzegovina
Capital: Sarajevo
Language: Bosnian, Croatian
Continent: Europe
Currency: convertible Mark(BAM)
Area: 51129km²
Population: 3531159
Density: 68.97/km²
Calling Code: +387
Internet Domain: .ba

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747. What is transpiration?

Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.
Transpiration is essentially evaporation of water from plant leaves.
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748. Why Uranus have Blue and Green color?

The temperature in the upper atmosphere is very cold. Its atmosphere is composed primarily of hydrogen and helium, with a small amount of methane and traces of water and ammonia. Uranus gets its blue-green color from methane gas. Sunlight is reflected from Uranus's cloud tops, which lie beneath a layer of methane gas.
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748. Why Uranus have Blue and Green color?

The temperature in the upper atmosphere is very cold. Its atmosphere is composed primarily of hydrogen and helium, with a small amount of methane and traces of water and ammonia. Uranus gets its blue-green color from methane gas. Sunlight is reflected from Uranus's cloud tops, which lie beneath a layer of methane gas.
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749. What is Argyria?

Argyria is a condition in which skin turns a blue-grey shade, provoked by ingesting silver. Broken down in the stomach, silver enters the bloodstream as a salt and is deposited in the skin. Light oxidises it, producing blue or grey-silver compounds. Sufferers have usually taken colloidal silver supplements – an alternative remedy with no known benefits.
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750. What is a Meteor Shower?

A meteor shower occurs when lots of meteoroids enter the Earth’s atmosphere. Meteoroids are bits of dust and rock from comets that are released when their orbit brings them close to the Sun. The Sun’s heat boils off some of the comet’s icy surface and the resulting debris then trails it in orbit. Meteoroids that enter the Earth’s atmosphere are known as meteors, and can regularly be seen travelling across the night sky. However, several times each year, the Earth’s orbit crosses with the orbit of a comet causing it to collide with a bunch of meteoroids all at once. As they are usually very small, most meteors burn up in the atmosphere before they reach the Earth’s surface, but those that do occasionally hit the ground are known as meteorites.
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Useful Daily Life Abbreviations

👉🏽 LASER: Light Amplification by Stimulated emission of Radiation 

👉🏽 RADAR: Radio Detection And Ranging

👉🏽 AIDS: Acquired Immune Deficiency Syndrome 

👉🏽 ROM: Read Only Memory

👉🏽 LAN: Local Area Network 
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​​751. Why do spiders sometimes stay still for a long time?

Web-spinning spiders obviously remain motionless while they are waiting for something to land in their web. Moving around wastes energy and draws attention to the spider, which makes it more likely to be eaten by birds, and makes flies less likely to get caught in the web.
Spinning a web is quite an energy-intensive process and a spider may have to wait days or weeks for a catch, so it is important to conserve as much energy as possible. Hunting spiders are much more active, but many of them are nocturnal predators and spend the day tucked away in a nest or under a rock - again, this is to conserve energy and avoid becoming prey.
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​​​​​​​​🔰 Know About Country 🔰

Country: Botswana
Capital: Gaborone
Language: Setswana, Kalanga
Continent: Africa
Currency: Pula
Area: 581,730 Km-sq
Population: 2,326,000
Density: 4 Per Km-sq
Calling Code: +267
Internet Domain: .bw

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​​​​​​💻 Know About Company 💻

Name : AT&T
Formerly called : Southwestern Bell Corporation (1983–1995),
SBC Communications (1995–2005)
Founded : October 5, 1983
Headquarters :Dallas, Texas, 
United States
Area served : Worldwide
Key people : Randall Stephenson
(Chairman, CEO and President
Products : Satellite television
Fixed line telephone
Mobile phone
Broadband
Digital television
Home security
IPTV
OTT Services
Network security
Services : Telecommunications
Mass media
Website : www.att.com

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Useful Daily Life Abbreviations

👉🏽 WWW: World Wide Web

👉🏽 DNA: Deoxyribonucleic Acid
 
👉🏽 SONAR: Sound Navigation And Ranging

👉🏽 SARS: Severe Acute Respiratory Syndrome 

👉🏽 NTP: Network Time Protocol/ Normal Temperature and Pressure 
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752. Why are American soldiers called GIs?

The reason behind this name is not totally clear, but the most widely believed theory dates back to the beginning of the 20th century, when the letters ‘GI’ were stamped on military trash cans and buckets to show they were made of galvanised iron. The theory goes that it was then used to refer to all things related to the army in World War I, but the meaning of the letters changed to ‘government issue’ or ‘general issue’. By the time World War II occurred, soldiers were referring to themselves as GIs. US toy company Hasbro created the popular GI Joe doll in 1964, and the nickname has stuck ever since.
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​​​​​​​​🔰 Know About Country 🔰

Country: Brazil
Capital: Brasilia
Language: Portuguese
Continent: South America
Currency: Brazilian Real
Area: 8515767 Km-sq
Population: 208568000
Density: 24.35 Per Km-sq
Calling Code: +55
Internet Domain: .br

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​​​​​​💻 Know About Company 💻

Name: Visa
Industry : Financial Services
Founded: 1958 (as BankAmericard)
Fresno, California, United States
Area: Worldwide
Founders:  Dee Hock
Products: Credit Card and Payment System
Headquarters: Foster City, California, United States
Website: www.visa.com

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Useful Daily Life Abbreviations

👉🏽 AM: Ante Meridian

👉🏽 PM: Post Meridan.

👉🏽 AD: Anno Domini

👉🏽 BC: Before Christ.

👉🏽 ISD: International Subscriber Dialling
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753. Why do energy-saving bulbs take time to ‘warm up’?

Energy-saving lightbulbs light up gradually since it takes time for the mercury inside the bulb to fully vaporise. The bulb contains a small amount of mercury in liquid form at room temperature. When you switch on the light, causing an electric current to run through the bulb, the heat converts the mercury to a gas, which emits ultraviolet radiation. The phosphor coating the bulb casing then absorbs this ultraviolet light, re-emitting it as visible light.
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​​​​​​💻 Know About Company 💻

Name: Boeing
Industry : Aviation
Founded: July 15, 1916 (as Pacific Aero Products Co.)
Seattle , Washington, U.S. Fresno, California, United States
Area: Worldwide
Founders:  William Boeing
Products: 737, 747, 767, 777, 787,
F/A-18E/F Super Hornet,
CH-47 Chinook,
702 satellite Family
Headquarters: Chicago, Illinois, U.S
Website: www.boeing.com

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​​​​​​​​​​​​🔰 Know About Country 🔰

Country: Brunei
Capital: Bandar Seri Begawan
Language: Malay
Continent: Asia
Currency: Brunei Dollar
Area: 5765 Km-sq
Population: 423000
Density: 73.37 Per Km-sq
Calling Code: +673
Internet Domain: .bn

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Useful Daily Life Abbreviations

👉🏽 ISD: International Subscriber Dialling

👉🏽 PCO: Public Call Office

👉🏽 STD: Standard Trunk Dialling / Sexually Transmitted Disease

👉🏽 ATM: Automatic Teller Machine / Any Time Money

👉🏽 ISBT: International Society of Beverage Technologists / International Society Blood Transfusion
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754. What is the powder like material found on the wings of butterflies? What is its use?

Butterflies and moths belong to the taxonomic order, Lepidoptera. In Greek, Lepido means scales and Ptera means wings. In other words, Lepidoptera means scaly wings.
As the order name implies, the powder like materials found on the Butterfly wings are called scales.
Butterfly wings have two membranous layers which are made up of chitinous materials. Wings are nourished by a number of tubular veins which play a significant role in oxygen exchange.
Like all other insects, butterflies also have two pairs of wings, viz forewings and hind wings. The wing surfaces are generally covered with unicellular, setae(hair) like or flattened, overlapping scales. Scales are outgrowths of the body wall and they are of different colours.
There are two fundamental mechanisms by which colous are produced on butterfly wings. the ordinary colour, the first one, is due to the presence of chemical pigments, which absorb certain wavelengths of the light and transmit or reflect others.
The second colour, which is known as iridescent colour, is produced by the interference of light due to multiple reflections within the physical structure of a material and thus most of the butterflies exhibit brilliant iridescence on their wings.
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755. How do Batteries get charged?

Inside each cell, chemical reactions take place involving the two electrical terminals (or electrodes) and a chemical known as the electrolyte that separate them. The good news is that if you're using a rechargeable battery, you can make the chemical reactions run in reverse using a battery charger.
Generally all smartphones we use contains lithium ion batteries.
A lithium-ion battery or Li-ion battery is a type of rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging.
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756. What are galactic clusters?

Galaxy cluster is any group of galaxies whose gravity is enough to overcome the general expansion of the universe and hold it together. About half of all galaxies are found in clusters of one sort or another. The least impressive clusters, known as galaxy groups, typically contain a handful of large systems surrounded by a few dozen smaller dwarf galaxies – our Milky Way galaxy, for example, is one of three large spirals in the so-called Local Group. Dense clusters, however, may contain up to a couple of thousand galaxies including dozens of large spirals and elliptical (ball-shaped) galaxies. Curiously, the size of clusters does not vary all that much – they are always around one to ten mega parsecs (or 3-33 million light years) across.
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757. Why do babies have their fists clenched almost all the time?

A newborn's hands are clenchedbecause of a reflex called the palmar grasp reflex. It is present in newborns and will be present until the baby is 5-6 months old. You can stroke an object, like a finger, in a newborn's palm to see the reflex. The baby will close his fingers and grasp the finger.
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758. How do Atoms decay?

When a radioactive atom decays, it loses energy by emitting particles or radiation. This process changes the composition of the nucleus, often transforming it into a new element. A carbon-14 atom has six protons and eight neutrons. When it undergoes beta decay, one of its neutrons splits into a proton, an antineutrino and an electron. The electron (also known in this case as a beta particle) and the antineutrino are ejected from the nucleus. The nucleus now has seven protons and seven neutrons – making it a nitrogen-14 atom.
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759. Why do we develop Gout?

Excessive levels of uric acid in the blood cause gout. We produce uric acid as a waste product from digesting protein. In a healthy person, uric acid is removed by the kidneys and excreted as a dilute solution (urine). But if your kidney function is impaired, the concentration rises to the point where it precipitates as monosodium urate crystals. These normally form in the joints of your toes, because your feet are cooler and cold temperatures reduce the solubility of uric acid. Gout is partly genetic, but exacerbated by excessive drinking – particularly beer – and not enough exercise.
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760. Where does slate come from?

Slate is a metamorphic rock. The slate in North Wales began as mud that settled at the bottom of the sea some 500 million years ago. As new layers settled on top, the lower ones eventually get compressed to form shale. Over millions of years the tectonic plates shifted and wrinkled to form the Welsh mountains and the shale became heated and compressed. This caused the minerals in the shale to partially melt and reform as thin sheets of mica and quartz. Because of the particular way the crystals grow, the layers of slate are at right angles to the original shale layers.
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761. What is an Anagram?

Anagrams are an extremely popular form of literary device where in the writer jumbles up parts of the word to create a new word. From the syllables of a phrase to the individual letters of a word, any fraction can be jumbled to create a new form. Anagram is a form of wordplay that allows the writer to infuse mystery and a little interactive fun in the writing so that the reader can decipher the actual word on their own and discover a depth of meaning to the writings.
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762. How are tattoos removed?

Modern forms of tattoo removal use lasers that emit short pulses of intense light, which pass harmlessly through the top layers of the skin and are absorbed by the tattoo pigment. This causes the pigment to fragment into smaller particles, which are then absorbed into the bloodstream and removed by the body’s immune system. Different types of lasers work on different pigment colours and will cause the tattoo to fade gradually over multiple sessions.
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763. Where do the biggest dust storms occur?

Mars is home to the largest and most powerful dust storms ever recorded. Martian dust storms have been known to engulf the entire planet in a haze for months at a time, making it difficult to single out one as being the biggest. Dust and sandstorms on Mars and Earth happen due to temperature differences in the atmosphere. Hot air moves to colder air, and this moving air can pick up tiny debris in arid landscapes. It is not known exactly why storms on Mars can spread so far, however the fact it is such a dusty world probably has something to do with it.
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764. Why alcohol is added in thermometer?

Ethanol-filled thermometers are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (-94 °F). The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used.
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765. What is MCV in blood tests?

Mean corpuscular volume (MCV) laboratory test, as part of a standard complete blood count (CBC), is used along with other RBC indices (MCH and MCHC) to help classify the cause of anemia based on red cell morphology. See also the Interpretation section above.
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766. What is Core? While buying a mobile phone you may seen written on it quad core, hexa core, octa core. So what is it?

A core is a independent unit that read and executes CPU instructions.
For example move data, copy data, etc.
Each core operates with conjunction (jointly) circuits and take care of management terms such as cache, memory management, input output port, etc.
So the performance of phone will be better if it has more number of core.
Usually Quad core processor is sufficient for a regular mobile user(who do not do load works on mobile like playing games of very high graphics).
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767. Nowadays while downloading movies you may see option of hevc, so what is HEVC?

Hevc stands for high efficiency video coding.
It is latest way of compressing videos.
For your surprise let me tell you that it can reduce original size of video to half of it without losing its quality!
HEVC or H.265 (written x265 where you read) codec videos are smaller in size than H.264 (x264) videos. Suffice it to say that it is a technology upgrade that allows better compression. The audio and video quality are almost the same and you get the same video file for about 300MB which if compressed by x264 would have amounted to 1.3GB approx.
720p is the resolution of the video. It fits a screen of 1280x720 pixels and is generally accepted to be HD (High Definition) although resolution and video quality can be independent.
Download the HEVC videos, they are more efficient and might need a video player update to run sometimes.
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768. Has a Comet ever hit our Planet?

Yes – on a cosmic timescale, comets hit the Earth frequently, but because they’re largely made of ice rather than solid rock, they tend not to leave obvious craters. A small comet is more likely than an asteroid to break up as it plunges into Earth’s atmosphere and heats up, often resulting in an explosion called an airburst that can devastate large areas of the landscape but doesn’t leave a crater. Perhaps the most famous such event happened over the Russian region of Tunguska in 1908, when an exploding comet fl attened some 2,000 square kilometres (770 square miles ) of Siberian forest. A comet would have to be pretty big in order to hit the ground intact.
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769. How do ultrasound scans work?

Ultrasound procedures are used for a number of medical reasons, most commonly to monitor the development of a foetus. Ultrasonography sends high-frequency sound waves through the body and measures their refl ected echoes to create a 2D image of internal structures. The transducer probe, which is placed on the skin, is specially designed to create and receive these waves. It does this using a principle called the piezoelectric eff ect. Quartz crystals – piezoelectric crystals – inside the transducer probe rapidly change shape and vibrate when an electric current passes through them. This causes sound waves to be produced, which travel freely through fl uid and soft tissue inside the body. However, once they reach a denser structure they will bounce back to the transducer as an echo. As a result, the crystals inside the probe emit electrical currents, which pass up to the central processing unit (CPU). The information gathered then forms an image on screen.
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770. How is Blood Pressure measured?

The most common method for measuring blood pressure uses a sphygmomanometer – an inflatable armband with a pressure gauge and hand pump. The doctor pumps the armband up enough to squeeze the brachial artery in your arm shut. They then gently let a little air out and listen with a stethoscope at the crook of your elbow, until they hear the blood just start to flow again. The pressure reading at this moment is your systolic pressure, which is the maximum pressure during each heartbeat. Releasing more air until there is no more sound through the stethoscope, gives the minimum pressure for the heartbeat, which is the diastolic pressure.
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771. Why do flames turn blue?

In a blue flame, two things are happening. First, the flame is very hot. Second, it is gas molecules that are glowing rather than pieces of soot. Very hot gas molecules glow blue.
Flames turn blue due to abundance of oxygen during combustion process, in turn undergoing complete combustion. A yellow/orange flame occurs when less oxygen supply is available due to lack of ventilation , in turn producing incomplete combustion, resulting in more CO², which pollutes the combustion process again, causing yellowish flames, until sufficient Oxygen and ventilation is provided.
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772. What is DTSI? Why it is used in motor bikes?

Digital Twin Spark ignition (DTSI) engine has two Spark plugs located at opposite ends of the combustion chamber and hence fast and efficient combustion is obtained. The benefits of this efficient combustion process can be felt in terms of better fuel efficiency and lower emissions.
Note: Spark plus is used to ignite fuel in motar engine.
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773. What is an amorphous solid?

An amorphous solid does not have a definite geometric or crystalline shape. It is a solid in which there is no long-term order in the positions of the atoms. Most classes of solid materials can be found or prepared in an amorphous form. For instance, common window glass is an amorphous ceramic, many polymers are amorphous, and even foods such as cotton candy are amorphous solids.
An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel.
Solids and liquids are both forms of condensed matter; both are composed of atoms in close proximity to each other. But their properties are, of course, enormously different. While a solid material has both a well-defined volume and a well-defined shape, a liquid has a well-defined volume but a shape that depends on the shape of the container. Stated differently, a solid exhibits resistance to shear stress while a liquid does not. Externally applied forces can twist or bend or distort a solid’s shape, but (provided the forces have not exceeded the solid’s elastic limit) it “springs back” to its original shape when the forces are removed. A liquid flows under the action of an external force; it does not hold its shape. These macroscopic characteristics constitute the essential distinctions: a liquid flows, lacks a definite shape (though its volume is definite), and cannot withstand a shear stress; a solid does not flow, has a definite shape, and exhibits elastic stiffness against shear stress.
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774. What's the story behind Twitter bird logo?

In 2010 Twitter decided that it needed a new logo. They wanted something that perfectly symbolized the tweets that were the cornerstone of the business so they invented the twitter bird. The twitter bird summed up the objectives of the company perfectly. Not only did “tweets” sound like something a bird would do, but his quick and speedy look symbolized the quick and simple messages that the service offered.
Twitter's Logo name is Larry bird.
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775. How Does Anesthesia Work?

Local anesthetics block the nerves that connect a particular body part or region to the brain, preventing the nerves from carrying pain signals to your brain. This renders patients unconscious with no perception or memory of the surgery (though pain from the surgical procedure will be apparent once you wake up).
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776. Why does the nose of a mountaineer bleed at high altitude?

At high altitudes, there's less oxygen available. This makes the air thinner and drier. The climate inside your nose also gets drier because of this. This makes the blood vessels exposed inside your nose more likely to burst there than at lower altitudes.
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777. Where are Oscar statues made?

Academy Award statues have been made in Chicago, USA in the factory of RS Owens & Company for the past 30 years. Every year, the factory produces around 50 of the 3.9-kilogram (8.5-pound) figurines, designed to resemble a Crusader holding a downward-pointing sword. The original Oscar statues were gold-plated solid bronze, but modern Oscars are cast from a metal alloy called britannium, then coated with 24-carat gold. The process takes ten days from start to finish, although the final touch – a gold plate etched with the winner’s name – isn’t added until after the awards ceremony itself.
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​​778. Why do you get Boogers in your Eyes?

Rheum is made up of mucus, skin cells, oils and dust. The rheum that comes from the eyes and forms eye boogers is called gound, which you may know as eye sand, eye gunk, sleep dust, sleep sand, sleep in your eyes. When you're awake, gound doesn't cause any problems.
Your eyes produce mucus throughout the day, but a continuous thin film of tears bathes your eyes when you blink, flushing out the rheum before it hardens in your eyes.
When you're asleep and not blinking, eye discharge collects and crusts in the corners of your eyes and sometimes along the lash line, hence the term "sleep in your eyes."
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​​778. Why do you get Boogers in your Eyes?

Rheum is made up of mucus, skin cells, oils and dust. The rheum that comes from the eyes and forms eye boogers is called gound, which you may know as eye sand, eye gunk, sleep dust, sleep sand, sleep in your eyes. When you're awake, gound doesn't cause any problems.
Your eyes produce mucus throughout the day, but a continuous thin film of tears bathes your eyes when you blink, flushing out the rheum before it hardens in your eyes.
When you're asleep and not blinking, eye discharge collects and crusts in the corners of your eyes and sometimes along the lash line, hence the term "sleep in your eyes."
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779. How do insects survive winter?

In order to survive winter, insects push the pause button, actually the diapause button.
During diapause an insect's metabolic rate drops to one tenth or less, so it can use stored body fat to survive winter. Also many insects produce alcohols for antifreeze. Their bodies can supercool (reach temperatures below freezing) without forming cell-damaging ice.
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780. How data is stored on a CD?

To store data on a CD, they need to be burned. The surface of a CD is made of a polycarbonate layer with molded spiral tracks on the top. The data are stored on the CD as a series of minute grooves which are known as 'pits' encoded on these spiral tracks. The areas between the 'pits' are known as 'lands'.
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781. How do hotel key cards work?

There are many types of key card systems used around the world, but their principles are all fundamentallyvery similar. When you check in to a hotel, the hotel receptionist uses a machine to store a code onto a magnetic strip or computer chip on your key card. This code matches the one stored by your hotel room’s electronic lock, which reads the code when you insert the card, and then switches on a small motor to unlock the door to your room. To change the code for each new guest, the lock is either sent a new code by a network, or the card and lock have the same preset list of codes. They can then be instructed to use the next one in the sequence when required.
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782. How does light travel down a fibre-optic cable?

At the core of the cable is a strand of plastic or pure optical glass about 0.01mm in diameter. Surrounding it is a highly reflective cladding with a different refractive index to that of the core. The refractive indices of each material are engineered to ensure that light always reflects back off the cladding and is never absorbed by it, regardless of whether the cable is straight or bent round. It's a bit like carrying a torch through a long winding tunnel lined with perfect mirrors.
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783. What is the difference between Table salt and Sea salt?

Table salt and sea salt have the same chemical composition, but different processing methods give them a slightly different taste and texture. Sea salt is produced by evaporating the water from seawater or saltwater lakes, leaving behind salt but also small amounts of minerals such as magnesium, calcium and potassium, which can affect flavour. The large salt crystals give it a relatively coarse texture. Table salt, on the other hand, is typically mined from salt deposits. It is washed, purified and stripped of any contaminants. Additives are then added to prevent it from clumping. Iodised salt also contains extra potassium iodide.
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784. What is Lazy Eye (Amblyopia)?

Amblyopia, commonly known as lazy eye, is the eye condition noted by reduced vision not correctable by glasses or contact lenses and is not due to any eye disease. The brain, for some reason, does not fully acknowledge the images seen by the amblyopic eye. This almost always affects only one eye but may manifest with reduction of vision in both eyes. It is estimated that three percent of children under six have some form of amblyopia.
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785. Why does the Sun bleach our hair?

The Sun bleaches our hair because the ultraviolet (UV) rays destroy melanin, the pigment responsible for hair colour. It also destroys melanin in our skin, but our skin gets darker instead of lighter. That’s because skin is alive and hair isn’t. When our skin is exposed to UV rays, it reacts by producing more melanin to protect our DNA from further damage. But there’s a limit to what the skin can do. That’s why long-term exposure to UV rays via tanning and sunburns can cause cosmetic damage and a dangerous skin cancer called melanoma.
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786. What are Earbuds?

To put it simply, earbuds are a more portable, more pleasurable and certainly more affordable alternative to headphones. A studio level ear bud will cost a fraction of the price of what a studio level headphone will cost. Just as there are many different types of headphones, there are many types of ear-buds. There are flat earbuds that sit on the tip of your ear, there are in-ear-canal earbuds and there are noise isolating earbuds. As each year passes there seems to be more and more earbuds available on the market. Each year a new company springs up, yet many other companies crush and burn.
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787. Why does chocolate make you thirsty?

Chocolate can make you very thirsty because of the way your body processes sugar. Sugar is absorbed very quickly into the bloodstream and it depletes your cells of water. They send the chemical message to your brain that it’s time to drink. Your brain can also sense when the sugar is getting too concentrated in your blood and tells you that you need to rehydrate. This isn’t limited to chocolate, though – any sugary food can have the same effect. So do salty foods, for that matter. That’s why many sweet foods are eaten with a glass of milk and many salty ones washed down with a beer.
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788. What are ocean dead zones?

Dead zones get their name from the fact that they can support very few plants and animals. This is due to the absence of oxygen, known as ‘hypoxia’. Hypoxic conditions can materialise in lakes and other standing bodies of water, but they can also occur in large areas of the ocean. The main cause of a dead zone is eutrophication – when minerals, usually of agricultural origin, are washed into the water. The heightened nutrient levels stimulate huge blooms of algae on the surface of the water. This then restricts oxygen making its way into the water, which eff ectively smothers everything living beneath it. Due to the agricultural nature of the nutrient runoff , dead zones often appear close to the shore. There are around 146 known coastal dead zones around the world, with the largest ones located in the Baltic Sea and the Gulf of Mexico.
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789. Can a Snail survive if its shell is broken?

Yes, provided that the damage isn’t too severe. Snailskeep a store of calcium in their bodies, in the form of dissolved salts, that they can mobilise for repair jobs. Special cells, called amoebocytes, will congregate around the crack and form a living elastoplast to hold the broken edges together. Over the course of a week or two, these cells are infused with calcium and gradually harden. In the case of more drastic repairs, the snail may actually borrow calcium from the rest of the shell by slightly thinning the walls from inside, to provide enough building material. While a snail is repairing its shell, it is much more vulnerable to predators and drying out, so it will stop eating and hide away. The snail’s survival depends on whether it can repair the damage before it dies of desiccation, hunger or infection.
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790. How does a Fogbow form, and is it really very different to a Rainbow?

A fogbow is similar to a rainbow in the sense that it is created from the same process of sunlight refraction and reflection. However, rather than being formed by raindrops, a fogbow is formed by the water droplets found in fog, mist or cloud. Although sunlight enters, and reflects from, the droplets, forming a large circle opposite the Sun – just as it does when a rainbow is formed – fog droplets are much smaller than raindrops, causing the light to diffract. The diffraction process dominates the reflection process, resulting in a colourless phenomenon. Although colour is present, the bow in each colour is so broad that the colours overlap, resulting in this washed-out effect.
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791. What is Underfloor heating?

Traditional wall-mounted radiator heating systems that are found in most homes convect heat into the room, sending heat towards the ceiling in a circular cycle. In contrast, underfloor heating consists of electric elements, or water pipes, that radiate heat up evenly throughout the whole room. For optimum efficiency, a thermostat in each room can monitor and control the temperature. Underfloor heating is also unobtrusive and easier to maintain as the elements, or pipework, can be embedded in concrete floors when houses are constructed, or they can be fitted under existing flooring. A saving of 20 per cent can be made on fuel bills, and for buildings with high ceilings, savings can reach as high as 40 per cent compared with traditional heating systems.
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792. What is Human Trafficking?

Human trafficking involves recruitment, harbouring or transporting people into a situation of exploitation through the use of violence, deception or coercion and forced to work against their will.
In other words, trafficking is a process of enslaving people, coercing them into a situation with no way out, and exploiting them.
People can be trafficked for many different forms of exploitation such as forced prostitution, forced labour, forced begging, forced criminality, domestic servitude, forced marriage, and forced organ removal.
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​​793. What is Eye of the Sahara?

Formally known as the "Richtat structure," the Eye of the Sahara is in Mauritania. Scientists are still trying to confirm how it was formed, but they think it's the eroded remains of a giant dome of rock. If so, it would have originally formed when magma pushing up towards the surface of the Earth created a bulge, like a pimple.
Each band of the ring is made of a different type of rock that erodes at a different speed. It's also the "almost home" signal for astronauts landing in Florida. In fact, astronauts are mostly responsible for teaching us there's something there in the first place, since the formation is difficult to recognize when you walk over it.
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794. What makes the Mexican Jumping Bean jump?

The thing that makes these beans jump is a tiny moth larvae that lives inside the bean. The moth lays its eggs in the flower of the plant, and the eggs are incorporated into the seeds. The larvae then eat out the interior of the bean and live there. When the larvae move, so does the bean.
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795. How do they create the Hopping cars you see in the movies?

These cars are known as lowriders, and they seem to be most popular in southern California. A lowrider is any car that has modifications allowing it to ride very low to the ground. Some people really like the look.
The problem with a lowrider is that things like speed bumps and rough roads can make driving difficult. To solve these problems, lowrider enthusiasts install hydraulic lift kits that allow a completely adjustable height for the vehicle. These kits use electric hydraulic pumps and normal hydraulic cylinders , to raise and lower the vehicle. Imagine connecting the cylinder alongside the shock absorber or the spring, and you get the idea. It's a pretty involved installation and can cost several thousand dollars.
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796. What is V chips?

The "V" stands for "violence," and the goal of the chip is to allow parents to choose the level of violent TV programming that will be allowed into the home.
The idea behind a V-chip is simple. TV shows have a signal embedded in them that gives the show a rating, and the chip can detect these ratings. 
Some V chips are:

TV-Y - All children can watch; zero violence or sexual content.

TV-Y7 - For children 7 and over.

TV-G - For general audiences; no sex, violence or inappropriate language.

TV-PG - Parental guidance suggested.

TV-14 - Suitable only for people over 14; some sex or violence.

TV-MA - Suitable only for mature audiences; may contain graphic violence or sexual situations.
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797. How does Stealth technology work?

The goal of stealth technology is to make an airplane invisible to radar. There are two different ways to create invisibility:
The airplane can be shaped so that any radar signals it reflects are reflected away from the radar equipment.
The airplane can be covered in materials that absorb radar signals.
Most conventional aircraft have a rounded shape. This shape makes them aerodynamic, but it also creates a very efficient radar reflector. The round shape means that no matter where the radar signal hits the plane, some of the signal gets reflected back:
A stealth aircraft, on the other hand, is made up of completely flat surfaces and very sharp edges. When a radar signal hits a stealth plane, the signal reflects away at an angle.
In addition, surfaces on a stealth aircraft can be treated so they absorb radar energy as well. The overall result is that a stealth aircraft like an F-117A can have the radar signature of a small bird rather than an airplane. The only exception is when the plane banks -- there will often be a moment when one of the panels of the plane will perfectly reflect a burst of radar energy back to the antenna.
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​​798. What is Electric Blanket?

An electric blanket is a bed covering with a built-in heating element so that a sleeper can maintain a desired temperature even in a cold room. Many consumers prefer electric blankets because their use can reduce home heating costs. The sophisticated temperature controls of modern electric blankets can sense changes in skin and air temperature and adjust settings accordingly. The most advanced model blankets are programmable, so they can pre-warm the bed at a certain time and shut off at a certain hour. They are also able to adjust temperature for the needs of two people in the same bed. Some blankets even compensate for the different heat needs of different parts of the body; for instance, sending more heat to the sleeper's feet while leaving the head area cooler. Approximately 4.5 million electric blankets are sold in the United States annually.
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799. How Does Google Map predict Traffic?

http://telegra.ph/How-does-Google-Maps-predict-traffic-04-09
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​​800. What is Google Earth?

Google Earth is a computer program that renders a 3D representation of Earth based on satellite imagery. The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles.
Satellite images like Google Earth are cool, but of course it's limited to images that are days, weeks or even year old. There are times that you would like to see realtime overhead imagery (who's that at the door?), but sadly that privilege is restricted to the NSA, CIA, MI6 and the rest of the alphabet soup.
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801. How does glow-in-the dark paint work?

Glow-in-the-dark paint contains a chemical called phosphor that absorbs energy and then releases it as visible light. When exposed to light, the phosphor atoms electrons are bumped up to a higher energy state. They remain in this state temporarily, storing the energy from the light. As the electrons drop back down to lower-energy states over time, they release the energy, emitting a faint glow. There are many different types of phosphor, but most glow-in-the-dark objects use strontium aluminate, which gives off a characteristic green light for several hours.
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​​802. What is Crookes Radiometer and how does it work?

The Crookes radiometer, also known as a light mill, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle.
A Crookes' radiometer has four vanes suspended inside a glass bulb. Inside the bulb, there is a good vacuum. When you shine a light on the vanes in the radiometer, they spin -- in bright sunlight, they can spin at several thousand rotations per minute!
The vacuum is important to the radiometer's success. If there is no vacuum (that is, if the bulb is full of air), the vanes do not spin because there is too much drag. If there is a near-perfect vacuum, the vanes do not spin unless they are held in a frictionless way. If the vanes have a frictionless support and the vacuum is complete, then photons bouncing off the silver side of the vanes push the vanes, causing them to rotate. However, this force is exceedingly small.
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​​802. What is Crookes Radiometer and how does it work?

The Crookes radiometer, also known as a light mill, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle.
A Crookes' radiometer has four vanes suspended inside a glass bulb. Inside the bulb, there is a good vacuum. When you shine a light on the vanes in the radiometer, they spin -- in bright sunlight, they can spin at several thousand rotations per minute!
The vacuum is important to the radiometer's success. If there is no vacuum (that is, if the bulb is full of air), the vanes do not spin because there is too much drag. If there is a near-perfect vacuum, the vanes do not spin unless they are held in a frictionless way. If the vanes have a frictionless support and the vacuum is complete, then photons bouncing off the silver side of the vanes push the vanes, causing them to rotate. However, this force is exceedingly small.
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803. Who developed the Seatbelt?

Volvo built their reputation on selling safer cars, but they gave away the most important safety device ever invented: the three-point seat belt. UK autos website Arnold Clark took a look back at what is now the universal modern seat belt, created by Volvo engineer Nils Bohlin in 1959.
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​​804. What is Torpedo?

The modern Torpedo is a self-propelled weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with its target or in proximity to it.
Historically, it was called an automotive, automobile, locomotive or fish torpedo; colloquially called a fish. The term torpedowas originally employed for a variety of devices, most of which would today be called mines. From about 1900, torpedo has been used strictly to designate an underwater self-propelled weapon.
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805. Why is Octopus Blood Blue?

Octopuses have blue blood. To survive in the deep ocean, octopuses evolved a copper rather than iron-based blood called hemocyanin, which turns its blood blue. This copper base is more efficient at transporting oxygen then hemoglobin when water temperature is very low and not much oxygen is around.
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806. What is Fossilised lightning?

Lightning lasts for only fractions of a second, but when conditions are just right, traces of it can be preserved for centuries in the form of fossils. If a bolt strikes sand, it can form a stone tube called a fulgurite. Sand is made from ground-up particles of rocks, minerals, and the shells and skeletons of living organisms. The exact composition varies depending on where you are in the world, but one of the most common components is silica – the key ingredient used to make glass. Glass is made by melting sand at temperatures in excess of 1,700 degrees Celsius, and a lightning strike provides more than enough energy to make it happen naturally. Sand doesn’t normally conduct electricity, but when it is wet it provides a path for the lightning. Gaps between sand grains trap water, and when lightning strikes, it passes through the liquid. The intense energy release produces searing heat, melting the grains and leaving behind a glassy cast that traces the outline of the bolt. Fulgurites can be made naturally, but it’s also possible to encourage their formation artificially by planting a conductive metal rod into wet sand, standing back and waiting for a storm.
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​​807. How does Indigo watch works?

Timex received the patent for the Indiglo® nightlight in 1988. The nightlight's bluish green light illuminates the entire dial of the watch evenly at the push of a button. The dial is coated with a compound of zinc sulfide mixed with copper, a substance which becomes luminescent when an electrical charge is applied.
As described in the Timex patent, you take a thin glass or plastic layer, coat it with a clear conductor, coat that with a very thin layer of phosphor, coat the phosphor with a thin plastic and then add another electrode. Essentially, what you have is two conductors (a capacitor) with phosphor in between. When you apply 100 to 200 volts AC (alternating current) to the conductors, the phosphor energizes and begins emitting photons.
Creating the high voltage can be a problem in a wristwatch. The watch has only a small 1.5-volt battery. To produce the 100 to 200 volts, the 1:100 transformer is used.