Do You Know
Questions & Answers on General Knowledge.
What’s a charley horse?
A charley horse a muscle cramp, or sudden, uncontrolled contraction of a muscle. This type of pain is generally felt in the legs, sometimes after heavy exercise, and usually lasts just a few minutes. The expression probably came from the word "charley," which is used to describe a horse that is lame.
Why are these trees called deciduous?
I have read about how black holes can emit X-rays and radiation. If they absorb light, why do they emit these other things?
Why are men’s and women’s bicycles built differently?
Why can ice, water and steam co-exist at "triple point"?
How does magnetism play a part in tapes to create sound?
Why can we see through glass and some minerals?
What are we doing when we “gild the lily”?
A while ago, there was a fad to have T-shirts that changed colors with changes in temperature. How did those shirts work?
How long will a magnetic tape stay magnetized? Won't it lose its magnetization very fast, like we saw with the iron nails?
What is the solar system?
A man falls into the center of the earth. how much does he weight? Which way is space bent in the center of the earth?
What is the difference between bacteria and viruses?
Is there any easy way to mold plastics?
What is a photoconductor?
How big is the universe?
Will the temperature of a gas in a closed container rise if is is vibrated in a vacuum?
Why does the bigger ball have more gravity pulling on it? Because it weighs more? Which causes which?
Which fishes blow themselves up like balloons?
How was hemlock used to poison in ancient times?
What are some everyday examples of friction? (For example, we couldn't walk without friction.)
Is Mount Everest the world’s tallest mountain?
What was the origin of a New York “ticker tape parade”?
How does a dehumidifier work?
Why is Venus hotter than Mercury?
What are the types of animals that live in North America?
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Smartphone Photography Tips and Tricks
Tripod & Shutter Cable
Reduce camera shake by building yourself a miniature tripod with a few pieces of cardboard. Then use the volume control on your headphones as a shutter release.