Do You Know
Questions & Answers on General Knowledge.
What is a magnetic field?
The area around a permanent magnet has a force that can affect other magnets or magnetic materials that come near it. This area is called a magnetic field. Even the Earth has a magnetic field. It is like a huge bar magnet. Even if you cut a huge bar magnet into tiny pieces, each piece is still a magnet with its own small magnetic field.
What do raptors eat?
How many explorations have been made to Jupiter?
How did written punctuation originate?
Why, when we don’t understand someone, do we say they’re talking “gibberish”?
How many dwarf planets are there in the solar system?
I know that photons are particles of light but how are photons related to the "excited" electrons in the atoms of a gas discharge?
What is the relationship between dark material and heat? Why does dark material absorb more heat than light material?
What is the difference between a chimaera and a shark?
How does the metal switch in a toaster bend?
How can you make noise by running your finger (if it's wet) along the rim of a glass?
Why is learning math important?
How does an automatic transmission in a car work?
How fast can a hummingbird fly?
How do electronic water softeners, where a coil of wire is wrapped around the incoming water pipe, work?
How does wing shape affect flight?
What is the difference between internal and external combustion engines?
What are germs?
What is the approximate terminal velocity for a spent falling bullet that was fired into the air? Is this velocity sufficient to kill someone?
Who was Akbar?
Why do I sometimes shock myself when I kiss Uncle Al?
Why are the fangs of the cobra shorter than those of the viper?
Are bones hard as a rock?
What do some permanent-magnet generators have stainless-steel axles?
When ice placed in water melts, does the overall volume of water increase, stay the same, or decrease?
Why do we refer to an important issue as “the burning question” of the day?
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A good night s sleep
While we sleep, organs, bones and tissue repair, and emotions and memories shift from an active to a storage part of the brain, essential for long-term memory. Insomnia is a common concern in later life, especially for women. What keeps us awake? Worry and health problems, according to a telephone survey of 1,000 Americans. And hot flashes.