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Curiosity Tea


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1. What is Zero Rupee Note ?

A zero rupee note is a banknote imitation issued in India as a means of helping to fight systemic political corruption. The notes are "paid" in protest by angry citizens to government functionaries who solicit bribes in return for services which are supposed to be free. Zero rupee notes, which are made to resemble the regular 50 rupee banknote of India, are the creation of a non-governmental organization known as 5th Pillar which has, since their inception in 2007, distributed over 2.5 million notes as of August 2014. The notes remain in current use and thousands of notes are distributed every month.
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2. What is the electrical conductivity of acids and bases?

Acid and Bases have different different electrical conductivity based on density of free ions present in it. A strong acid/base conduct electricity easily. More strong means more the number of ions. Let us suppose, if you are connecting a bulb in a circuit with strong acid/base solution, bulb will glow accordingly.. if you are connecting it with weak acid/base solution, bulb will not glow significantly.

It just depends on strength of acid/base.Both can conduct electricity.
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3. How hot does it get on Mars?

The temperature on Mars may reach a high of about 70 degrees Fahrenheit (20 degrees Celsius) at noon, at the equator in the summer, or a low of about -225 degrees Fahrenheit (-153 degrees Celsius) at the poles.
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4. How many Sudoku puzzles are there?

There are a total of 6,670,903,752,021,072,936,960 possible solutions, yet when mathematicians took away rotations, reflections, permutations and relabeling, which takes away the same puzzle in just a different form, the number of solutions was 5,472,730,538.
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5. Which is the only country crossed by both the equator and the Tropic of Capricorn?

The Tropic of Capricorn lies at 23.5° South of the equator and runs through Australia, Chile, southern Brazil (Brazil is the only country that passes through both the equator and a tropic), and northern South Africa.
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6. What makes hot peppers hot?

It is an irritant for mammals, including humans, and produces a sensation of burning in any tissue with which it comes into contact. Capsaicin and several related compounds are called capsaicinoids and are produced as secondary metabolites by chili peppers, probably as deterrents against certain mammals and fungi.
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7. How many genes does a human being have?

Before the completion of the human genome project, many scientists were expecting to find 100,000 or more genes in our genome. This was based on the assumption that because we are one of the most complex creatures on Earth we should have lots of genes. However, it turned out we only have around 24,000 genes.
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8. How many times was Harry Potter rejected by publishers?

J.K Rowling was famously rejected by a mighty 12 publishers before Harry Potter and The Philosopher's Stone was accepted by Bloomsbury - and even then only at the insistence of the chairman's eight-year-old daughter.
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9. What is the chemical in diapers?

Some brands enhance the inner lining with aloe and vitamin E, skin-friendly compounds that are often found in diaper rash creams. The absorbent center contains wood pulp and super-absorbent polymers, usually sodium polyacrylate.
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10. Who was the first man to fly around the world?

Wiley Hardeman Post (November 22, 1898 – August 15, 1935) was a famed American aviator during the period known as the Golden Age of Aviation, the first pilot to fly solo around the world.
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11. What is Sardine Run ?

Every year, between the months of May and July, many millions of silvery sardines travel north from the cold southern oceans off South Africa's Cape Point forming this huge cluster of running fishes.
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12. what is Lenticular clouds ?

A lenticular cloud is a lens-shaped cloud that normally develops on the downwind side of a mountain or mountain range. This occurs when stable, moist air flows over a mountain, creating a series of oscillating waves.
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13. what is Catumbo lightening ?

It is a continuous (high frequency) lightning from a near-daily thunderstorm complex that forms in the Catatumbo River. Electrical conductivity of the clouds, which cause these extended lightning strikes which can upto last 10 hours.
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14. How long would it take you to run around the world?

Hence, Earth circumference is 2*Pi*r is about 40,030 km. Now is up to you to decide the amount of running per day. If you run a marathon 42.2 km per day, you'll be done in around 2.5 years.
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15. Why is Greece first in the Olympic parade?

Traditionally (starting at the 1928 Summer Olympics), Greece enters first, because of its historical status as the progenitor of the Olympics, while the host nation marches last. In the 2004 Summer Olympics in Athens, the Greek flag led the parade, while the Greek team marched in last, as the host nation.
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16. What causes hail to form?

Hail is caused when raindrops are lifted up into the atmosphere during a thunderstorm and then supercooled by temperatures below freezing, turning them into ice balls, says Dr. Dick Orville of Texas A&M University. "The faster the updraft on these balls of ice, the bigger they can grow," he adds.
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17. What colour is hippo milk ?

The color of Hippo's milk is bright pink. The reason why it is pink is that hippo secretes two kind of unique acids called “Hipposudoric acid” and “Norhipposudoric acid“. The two acids got their names from the word Hippopotamus.
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18. What animal has the shortest gestation period?

The shortest known gestation is that of the Virginian opossum, about 12 days, and the longest that of the Indian & African Elephant, about 22 months.
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19. When was the first website created?

The first website built was at CERN within the border of France, and was first put online on 6 August 1991: Info.cern.ch was the address of the world's first-ever web site and web server, running on a NeXT computer at CERN.
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20. What was the first fast food restaurant?

Arguably, the first fast food restaurants originated in the United States with A&W in 1919 and White Castle in 1921. Today, American-founded fast food chains such as McDonald's and KFC are multinational corporations with outlets across the globe.
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21. Which bird is the fastest swimmer?

In flight, the fastest bird is the spine-tailed swift of Siberia which can reach speeds in excess of 100 miles per hour, but the fastest bird in the water is the Gentoo penguin, which swims at about 22 mph. (Watch this video of a Gentoo swimming madly to avoid a pod of hungry orcas.)
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22. How long would your DNA be if you stretch it out?

Each of us has 60 – 90 trillion cells so our DNA is very, very tiny when coiled up. If you could take it out of a cell and stretch it into a line, our DNA would be more than six feet long. That's almost two meters.
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23. Which African country is not a member of the African Union?

Morocco is the only African country not to have joined the AU. It left the Organisation of African Unity in 1984, after the OAU granted membership to the Saharan Arab Democratic Republic set up by the independence movement in the disputed territory of Western Sahara.
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24. What product had the first barcode stamped on it?

George J. Laurer is considered the inventor of U.P.C. or Uniform Product Code, which was invented in 1973. In June 1974, the first U.P.C. scanner was installed at a Marsh's supermarket in Troy, Ohio. The first product to have a barcode included was a packet of Wrigley's Gum.
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25. Do your eyes ever grow?

Answer: The eyeball is the only organism which does not grow from birth. It is fully grown when you are born. When you look at a baby's face, so see mostly iris and little white. As the baby grows, you get to see more and more of the eyeball.
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26. How is hair produced and how does it grow?

Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft.
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27. Which is the only bird that can fly backwards and forwards?

Hummingbirds are incredible flyers, with the ruby-throated hummingbird beating its wings 80 times every second, an ability that inspired this blog's name. These tiny birds can fly forwards, hover, and are the only known birds to fly backwards as well.
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28. Why is beer in brown bottles?

Beer bottle is a bottle made to contain beer, usually made of glass and comes in various sizes, shapes and colours (usually brown or green). Dark amber or brown glass greatly reduces the presence of UV light, a contributing factor of beer spoilage. However, lighter-colored bottles are often used for marketing reasons.
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29. How many miles is a nautical knot?

It is slightly more than a statute (land measured) mile (1 nautical mile = 1.1508 statute miles ). Nautical miles are used for charting and navigating. A knot is one nautical mile per hour (1 knot = 1.15 miles per hour ).
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30. Why do you cry when you cut onions?

When you cut an onion, it releases a gas called, ready for this, Propanethiol S-oxide. When mixed with certain enzymes in the onion, it creates a sulfur gas. These gases then get to your eyes and create a mild acid which irritates the eyes.
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31. How is food cooked in a microwave?

Cooking with Microwaves. Microwaves are produced inside the oven by an electron tube called a magnetron. The microwaves are reflected within the metal interior of the oven where they are absorbed by food. Microwaves cause water molecules in food to vibrate, producing heat that cooks the food.
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32. Which is the only snake that builds a nest?

The female snake, about 13 feet long, builds a nest to lay its eggs. In fact, the King Cobra is the only snake in the world that builds a nest.
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33. When was the hot air balloon invented?

On November 21, 1783 the first free flight carrying a human occurred in Paris, France. It was in a hot air balloon made of paper and silk made by the Montgolfier brothers. The balloon carried two men, Francois Pilatre de Rozier and Francois Laurent, Marquis of d' Arlanders.
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34. Why does your hair turn white when you get older?

As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color like gray, silver, or white as it grows.
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35. Who wrote the first computer program?

Augusta Ada King, Countess of Lovelace (10 December 1815 – 27 November 1852), born Augusta Ada Byron and now commonly known as Ada Lovelace, was an English mathematician and writer chiefly known for her work on Charles Babbage's early mechanical general-purpose computer, the Analytical Engine.
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36. Is it possible to fire a gun in space?

Fires can't burn in the oxygen-free vacuum of space, but guns can shoot. Modern ammunition contains its own oxidizer, a chemical that will trigger the explosion of gunpowder, and thus the firing of a bullet, wherever you are in the universe. No atmospheric oxygen required.
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37. Which animal's eye is bigger than its brain?

Ostrich has the biggest eyes in the whole animal kingdom. Its eye is bigger than its brain. Ostriches don't hide their head in the sand. They will lay their head on the ground if they sense a danger.
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38. What was the first country to allow females to vote?

New Zealand was the first country to allow women to vote (in 1893), while the King Abdullah of Saudi Arabia granted women the right to vote in 2011. The United States finally began allowing women to vote in 1920, after the ratification of the 19th Amendment to the Constitution.
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39. How many moons does Saturn have?

The moons of Saturn are numerous and diverse ranging from tiny moonlets less than 1 kilometer across to the enormous Titan which is larger than the planet Mercury. Saturn has 62 moons with confirmed orbits, 53 of which have names and only 13 of which have diameters larger than 50 kilometers.
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40. Which is the longest word in English?

Longest Words. (45) PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS (also spelled PNEUMONOULTRAMICROSCOPICSILICOVOLCANOKONIOSIS) = a lung disease caused by breathing in particles of siliceous volcanic dust. This is the longest word in any English dictionary.
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41. When was the first commercial jet flight?

Then, on May 2, 1952, the British Overseas Aircraft Corporation (BOAC) began the world's first commercial jet service with the 44-seat Comet 1A, flying paying passengers from London to Johannesburg. The Comet was capable of traveling 480 miles per hour, a record speed at the time.
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42. Which country is in 2 different continents?

Portugal: Continental Portugal is in Europe, while the Azores archipelago (also associated with Europe) has two islands (Corvo and Flores) that are part of the American plate (which makes it a tricontinental country, see Africa and Europe section below).
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43. How many different types of trees are there in the world?

There are about 750 types of trees in North America and about 100,000 in the world. Many of those are endangered. Those numbers count both conifer (cone bearing) trees and deciduous trees.
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44. How many zeros are there in a VIGINTILLION?

a cardinal number represented in the U.S. by 1 followed by 63 zeros, and in Great Britain by 1 followed by 120 zeros.
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45. Why is the keyboard keys not in alphabetical order?

The reason dates back to the time of manual typewriters. When first invented , they had keys arranged in an alphabetical order, but people typed so fast that the mechanical character arms got tangled up. So the keys were randomly positioned to actually slow down typing and prevent key jams.
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46. Can clownfish change gender?

Clownfish, wrasses, moray eels, gobies and other fish species are known to change sex, including reproductive functions. A school of clownfish is always built into a hierarchy with a female fish at the top. When she dies, the most dominant male changes sex and takes her place.
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47. How many islands are there in Japan?

Japan is a stratovolcanic archipelago of 6,852 islands. The four largest islands are Honshu, Hokkaido, Kyushu, and Shikoku, which together comprise about ninety-seven percent of Japan's land area.
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48. Where is Coca Cola not sold?

There are now just two countries in the world where Coca-Cola cannot be bought or sold - at least, not officially. They are Cuba and North Korea, which are both under long-term US trade embargoes (Cuba since 1962 and North Korea since 1950).
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49. What do you call the smell after it rains?

One of these odors, called "petrichor," lingers when rain falls after a prolonged dry spell. Petrichor the term was coined in 1964 by two Australian scientists studying the smells of wet weather is derived from a pair of chemical reactions.
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50. What causes red hair?

About 1 to 2 percent of the human population has red hair. Redheads have genes to thank for their tresses. Research shows red hair usually results from a mutation in a gene called MC1R, which codes for the melanocortin-1 receptor. The pigment found in redhair that makes it red is called pheomelanin.
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51. Why are there 60 seconds in a minute?

THE DIVISION of the hour into 60 minutes and of the minute into 60 seconds comes from the Babylonians who used a sexagesimal (counting in 60s) system for mathematics and astronomy. They derived their number system from the Sumerians who were using it as early as 3500 BC.
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52. What countries made up united kingdom?

The official name of the UK is the "United Kingdom of Great Britain and Northern Ireland". The name refers to the union of what were once four separate nations: England, Scotland, Wales and Ireland (though most of Ireland is now independent). The United Kingdom is made up of: England - The capital is London.
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53. When was glass first made?

Archaeologists have found evidence of man-made glass which dates back to 4000 BC; this took the form of glazes used for coating stone beads. It was not until 1500 BC that the first hollow glass container was made by covering a sand core with a layer of molten glass.
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54. What does the medical symbol stand for?

Hermes was the god of commerce, so this symbol has been used incorrectly to identify the medical profession. The correct symbol is the Rod of Asclepius, the god of healing and medicine. The Rod of Asclepius has a staff and one serpent.
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55. Which country first adopted time zones and when?

On November 2, 1868, the then-British colony of New Zealand officially adopted a standard time to be observed throughout the colony, and was perhaps the first country to do so. It was based on the longitude 172°30′ East of Greenwich, that is 11 hours 30 minutes ahead of GMT.
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56. How much is a moment in time?

A moment is a medieval unit of time equal to 1.5 minutes or 1/40 of an hour. This reckoning is derived from the work of Bartholomeus Anglicus, writing in 1240 that each hour was divided into four points, each point into ten moments, each moment into twelve ounces, and each ounce into 47 atoms.
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57. How many rooms are there in the White House?

White House Trivia. There are 132 rooms, 35 bathrooms, and 6 levels in the Residence. There are also 412 doors, 147 windows, 28 fireplaces, 8 staircases, and 3 elevators.
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58. Why is the ring of fire called the ring of fire?

The area encircling the Pacific Ocean is called the "Ring of Fire," because its edges mark a circle of high volcanic and seismic activity (earthquakes). Most of the active volcanoes on Earth are located on this circumference.
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59. What color do dogs eyes reflect?

The colors of a dog's eyeshine aren't limited to red and green, either. They can be all shades of blue, orange, yellow, turquoise or even violet. The specific color reflected depends on the amount of zinc or riboflavin in the eye cells. Red glowing eyes at night are the result of blood vessels reflecting light.
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60. Why do mosquito bites itch?

While bees and wasps inject venom when they sting, mosquitoes simply bite to feed on your blood. The bumps and itchiness that follow come from an anticoagulant that the mosquito injects to prevent your blood from clotting, which triggers a mild allergic reaction that includes the typical round, red bumps.
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61. What causes your heart to beat?

The electrical system of your heart is the power source that makes this possible. The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract. This forces blood into the ventricles.
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62. Can you feel pain in your brain?

There are no pain receptors in the brain itself. But he meninges (coverings around the brain), periosteum (coverings on the bones), and the scalp all have pain receptors. Surgery can be done on the brain and technically the brain does not feel that pain. With that said, the brain is the tool we use to detect pain.
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63. What percentage of the human brain is water?

"Your brain is made up of about 75 percent water" and then "The human brain is the fattest organ in the body and may consists of at least 60 percent fat". Or: "The old adage of humans only using 10% of their brain is not true.
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64. Why do we put candles on top of birthday cakes?

Some believe that the tradition of birthday candles began in Ancient Greece, when people brought cakes adorned with lit candles to the temple of Artemis, goddess of the hunt. The candles were lit to make them glow like the moon, a popular symbol associated with Artemis.
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65. Why is it called the alphabet?

The English word alphabet came into Middle English from the Late Latin word alphabetum, which in turn originated in the Greek ἀλφάβητος (alphabētos), from alpha and beta, the first two letters of the Greek alphabet.
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66. What was the first city to reach a population of one million?

The first city to reach a population of 1 million people was Rome, Italy in 133 B.C. London, England reached the mark in 1810 and New York City, USA made it in 1875. Today, there are over 300 cities in the world that boast a population in excess of 1 million.
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67. What is hyperloop ?

Hyperloop is a high-speed transportation system, incorporating reduced-pressure tubes in which pressurized capsules ride on an air cushion that is driven by a combination of linear induction motors and air compressors.

It is an entirely new mode of transportation that eliminates all travel complications and objections due to cost, travel time and weather conditions.

Traveling as fast as the speed of sound, the Hyperloop will be faster than today's conventional methods of transportation. At about 760 MPH.
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68. What is Li-Fi?

Li-Fi is a new technology that can readily transmit data in a wireless environment at a speed of light. Yes, you heard it right at the speed of light. They say that it is over 100 times faster than Wi-Fi.
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69. What is Loon Project ?

Project Loon is a research and development project being developed by Google X with the mission of providing Internet access to rural and remote areas. The project uses high-altitude balloons placed in the stratosphere at an altitude of about 32 km (20 mi) to create an aerial wireless network with up to 3G-like speeds.
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70. What is cormorant ?

The Cormorant, an autonomous flying ambulance created by Urban Aeronautics, has successfully completed its first test flight.
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71. What is fact about Golden Gate Bridge ?

While planning the Golden Gate Bridge, one of the engineers had to solve 33 algebraic equations involving from 6 to 36 variables each to make sure the bridge could withstand any storms from the Pacific.
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72. What is the physics behind a bowler rubbing the ball so many times before bowling it in the cricket match?

When bowler is rubbing one side of ball he is actually polishing or smoothening the surface of the ball. Other half of the ball remains as it is or more rough. When baller throws the ball at high velocity low pressure is created near smooth surface and high pressure area is created on rougher side. This pressure differential SWINGS ball in air and.... clean bowled! !!
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73. What was the reason behind first world war ?

The simplest answer is that the immediate cause was the assassination of Franz Ferdinand, the archduke of Austria-Hungary. His death at the hands of Gavrilo Princip – a Serbian nationalist with ties to the secretive military group known as the Black Hand – propelled the major European military powers towards war.
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74. What is SOFIA ?

SOFIA is a Boeing 747SP jetliner modified to carry a 100-inch diameter telescope. It is joint project of NASA and German Aerospace Center. It detects atomic oxygen in the space of Mars.
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75. Why do golf balls have dimples ?

For aerodynamic purposes. A smooth, solid ball won't fly nearly as straight or far as a golf ball with dimples. This is due to the thin layer of turbulent air the dimples create on a golf ball in flight. Small hollows which are present on the surface of a golf ball are called 'dimples'. The dimples on a golf ball "create a thin turbulent boundary layer of air that clings to the ball surface. This allows the smooth flow of air.
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76. What is mind-blowing facts about 'hp' brand ?

We see 'hp' today as a great brand. But it could have been 'ph' instead of 'hp'. It was all decided by the flip of a coin. Hewlett-Packard (HP) company's co-founders Bill Hewlett and David Packard tossed a coin to choose whether the company would be called Hewlett-Packard (HP) or Packard-Hewlett (PH). Whoever will win the toss, will have his name at first place. Hewlett won the toss and the tech company was named Hewlett-Packard.
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77. Which country is the largest cutting and polishing of diamonds centre in the world?

Today India is the largest diamond cutting and polishing center in the world. It enjoys 60% value share for diamond cutting and polishing, 85% volume share and 92% share of the world market in terms of number of pieces.
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78. How hotmail website got its name?

Founder Jack Smith got the idea of accessing e-mail via the web from a computer anywhere in the world. When Sabeer Bhatia came up with the business plan for the mail service, he tried all kinds of names ending in 'mail' and finally settled for hotmail as it included the letters "html" - the programming language used to write web pages. It was initially referred to as HoTMaiL with selective uppercasing.
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79. What is bypass heart surgery ? 

Using a blood vessel from elsewhere in the body (for instance, the internal thoracic artery), the surgeon will create an alternate route for blood to travel.
79. What is bypass heart surgery ?

Using a blood vessel from elsewhere in the body (for instance, the internal thoracic artery), the surgeon will create an alternate route for blood to travel.
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80. Who invented traffic lights and where were the first ones situated?

THE FIRST traffic signal was invented by J P Knight, a railway signalling engineer. It was installed outside the Houses of Parliament in 1868 and looked like any railway signal of the time, with waving semaphore arms and red-green lamps, operated by gas, for night use. Unfortunately it exploded, killing a policeman. The accident discouraged further development until the era of the internal combustion engine. Modern traffic lights are an American invention. Red-green systems were installed in Cleveland in 1914. Three-colour signals, operated manually from a tower in the middle of the street, were installed in New York in 1918.
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80. Who invented traffic lights and where were the first ones situated?

THE FIRST traffic signal was invented by J P Knight, a railway signalling engineer. It was installed outside the Houses of Parliament in 1868 and looked like any railway signal of the time, with waving semaphore arms and red-green lamps, operated by gas, for night use. Unfortunately it exploded, killing a policeman. The accident discouraged further development until the era of the internal combustion engine. Modern traffic lights are an American invention. Red-green systems were installed in Cleveland in 1914. Three-colour signals, operated manually from a tower in the middle of the street, were installed in New York in 1918.
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81. What is BREXIT ?

Brexit is an abbreviation for "British exit" which refers to the June 23, 2016, referendum whereby British citizens voted to exit the European Union. The referendum roiled global markets, including currencies, causing the British pound to fall to its lowest level in decades.
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82. Why did Russia offered Alaska to U.S. ?

Russia offered Alaska to the US in 1859, because they wanted the US to "off-set the designs of Russia's greatest rival in the Pacific, Great Britain." The Civil War in the US delayed the sale, but after the war, Secretary of State William Seward accepted Russia's renewed offer. On March 30, 1865, he agreed to a proposal from the Russian minister Eduoard de Stoeckl, and bought Alaska for 7.2 million dollars. The Senate approved the treaty on April 9th, Andrew Johnson signed it on May 28th, and Alaska was officially transferred to the US on October 18th.
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83. What is Net Zero Energy Building ?

A net-zero energy building (NZEB) also known as zero net energy (ZNE) building, is a building with zero net energy consumption, i.e the total amount of energy used by the building on an annual basis is roughly equal to the amount of renewable energy created on the site or in other definition by renewable energy sources elsewhere.
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84. How do bees make honey ?

You may have seen honeybees buzzing around flowers. If you watch them without getting too close, you will see them crawl right down into a flower. They are searching for a few drops of the sweet nectar, or sugar water, that the flower makes.

The bee will carry a load of nectar from a lot of flowers back to the hive. Then the bees will use their wings to move a little draft of air to evaporate most of the water. What's left is honey.
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85. How does Cows produce milk ?

A cow's special four-chambered stomach breaks down grasses she eats into things that nourish her and produce milk. The first chamber softens chewed plant material, which the cow burps up and chews again several times. In the next chamber, microorganisms feed on the plant material, making energy and proteins. As the material moves through the other chambers and into the small intestine, nutrients and excess water are absorbed into the bloodstream and then circulate to the mammary gland in the udder. There, special cells combine the nutrients with sugars from the cow's liver to create milk.
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86. How does star blow up ?

A hot bright star blows up when it runs out of fuel.

Here's why that happens. The force of gravity is always puling the matter in the star toward the center. But in that center, small bits of matter called atoms are always fusing together, making bigger atoms and releasing huge amounts of energy. That energy pushes outward and works against the gravity during the star's life. After many millions of years, the star runs out of small atoms. Then it has no more energy to push outward. The star collapses, and when the matter collides in the center, it explodes.
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87. What is the reason of Tides in Sea ?

The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Ocean levels fluctuate daily as the sun, moon and earth interact.
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88. How does aquatic animal survive under frozen lake ?

Underneath the frozen upper layer, the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds.
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89. What is bio ceramics ?

Bioceramics are ceramicmaterials specially developed for use as medical and dental implants. They are usually used to replace hard tissue in the body like bone and teeth. Common bioceramics are alumina, zirconia and a form of calcium phosphate known as hydroxyapatite.

Bioactive and Bioinert

Bioactive ceramics interact with the body so that tissue bonding and eventual incorporation into the body occurs after a time. Calcium phosphate-based bioceramics are bioactive.

Bioinert ceramics do not interact with the body's environment apart from causing an initial ‘fibrous tissue’ reaction, which coats the ceramic. Alumina and zirconia-based ceramics are classed as bioinert.
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90. How does a ball point pen works ?

A ball point pen is a pen that uses a small rotating ball made of brass, steel, or tungsten carbide to disperse ink as you write. All of the pens that preceded the ballpoint -- whether quill, metal or fountain -- used a watery, dark india ink that fed through the penusing capillary action. The ink can flow unevenly.
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91. How does detergent and soap works ?

Soaps and detergents are made from long molecules that contain a head and tail. These molecules are called surfactants. Water alone can't clean clothes because it won't attach to molecules of grease and dirt. Detergent is different. The surfactants it contains are made of molecules that have two different ends. One end is strongly attracted to water; the other is attracted to oily substances like grease.
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92. Who created the first world map ?

The earliest Greek known to have made a map of the world was Anaximander. In 6th century BC, he drew a map of the then known world, assuming that the earth was cylindrical. The first Greek to draw a world map using the assumption of a spherical earth was Eratosthenes.
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93. Why food cook faster in pressure cooker ?

The trapped steam increases the atmospheric pressure inside the cooker by 15 pounds per square inch (psi), or 15 pounds above normal sea-level pressure. At that pressure, the boiling point of water is increased from 212°F to 250°F. This higher temperature is what cooks food faster.
Curiosity Tea

94. Why does milk help with spicy food ?

Spicy foods contain a substance from chillies called capsaicin. Capsaicin stings taste buds, and milk binds with the hot capsaicin oils to disperse them. Cold water is not effective to mitigate spiciness because water-based liquids spread capsaicin and likely increase the burning sensation.
Curiosity Tea

Curiosity Tea

95. How does digital camera works ?

A digital camera takes light and focuses it via the lens onto a sensor made out of silicon. It is made up of a grid of tiny photosites that are sensitive to light. Each photosite is usually called a pixel, a contraction of "picture element". There are millions of these individual pixels in the sensor of a DSLR camera.
Curiosity Tea

96. What does ozone layer do ?

When the ozone layer absorbs the sun's ultraviolet radiation, it creates a source of heat and regulates the temperature of the Earth's atmosphere. If the ozone didn't filter the sun's ultraviolet radiation, most of it would reach the Earth's surface, which would be dangerous for plants and animals.
Curiosity Tea

97. What is open sky offer?

Open Sky Policy: Open sky refers to an agreement between two countries to allow any number of airlines to fly from either of them without any restriction on number of flights, number of destinations, number of seats, price and so on.
Curiosity Tea

98. Why does octopus have 3 hearts?

Octopuses have three hearts. Two branchial hearts pump blood through each of the two gills, while the third is a systemic heart that pumps blood through the body. Octopus blood contains the copper-rich protein hemocyanin for transporting oxygen.