Do You Know
Questions & Answers on General Knowledge.
Why is Friday the thirteenth considered to be bad luck?
The number thirteen represents Judas, the thirteenth to arrive at the Last Supper. Friday by itself is unlucky because it was the day of Christ’s Crucifixion. Years ago, the British set out to disprove these superstitions. They named a new vessel HMS Friday, laid her keel on a Friday, and then sent her to sea on a Friday that fell on the thirteenth. The plan backfired: neither ship nor crew was ever heard from again. Then, of course, there’s Apollo 13.
If heat rises, how come snow accumulates on mountains? Why is it colder up there instead of down here?
Can astronauts drink soda in space?
How does electric current create magnetic poles in metal? When the current goes through the metal, what makes it positive and negative?
Why is it any worse to observe a solar eclipse rather than a normal glimpse at the sun?
How does current flow and return in a home electric hot water heater? I only see two black hot wires and no white return wire.
Why, when there’s no turning back,do we say,“The die is cast”?
Is it possible to live in space?
How do they split the first atom in an atomic bomb?
What exactly are angular speed and angular velocity?
How do we actually see?
Are fangs important to snakes?
What led to the French Revolution?
Is a CB radio also an AM radio?
Why does my cat purr?
What happens to gas in a gas mask?
What is the relationship between turbulence, laminar flow, and Reynolds number?
Is Earth at the center of the universe?
Why do seasons on Uranus last for over 20 years?
Why do neutrinos only spin left?
What is a googol?
Can a rocket, starting back toward the earth from 30,000 feet, reach the speed of sound before reaching the earth?
Why do we call New York the “The Big Apple”?
Why is CD audio better than that of a cassette?
Can you explain gyroscopic precession?
What did the stegosaurus use the plates on its back for?
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