Do You Know
Questions & Answers on General Knowledge.
Does ice melt faster in air or in water?
Ice will melt fastest in whatever delivers heat to it fastest. In general that will be water because water conducts heat and carries heat better than air. But extremely hot air, such as that from a torch, will beat out very cold water, such as ice water, in melting the ice.
Why do people in flash pictures have "red eye"? How do cameras try to solve that problem?
Do microwaves have no effect on gas?
What is American Sign Language, and does it have an alphabet?
In alternating current, current reverses directions rapidly between the two wires, white and black. Why is it that only the black wire is "hot"?
Why when someone is betrayed do we say he was “sold down the river”?
How are bats able to fly?
Why do the front brakes of a bike provide more braking power than the rear brakes, assuming both are applied with equal pressure?
Are some frequencies of sound more directional than others and, if so, why?
How do windmills work to generate electricity?
How was hemlock used to poison in ancient times?
Why is exercise important to health?
How do balloon pilots navigate around countries that forbid overflights?
What do I do if witness bullying on the playground?
How did the shamrock become a symbol of St. Patrick?
Which was the first reptile?
Please explain what "lift" is.
How are plants and animals related?
If you stand between the two satellites, would you have light on you?
Are all flowers fragrant?
How do pufferfish get their name?
Why do we use Xs as kisses at the bottom of a letter?
How does electricity get to my home?
How do you calculate how much weight a helium balloon can lift?
How are the binary numbers represented in the ridges of the CD?
What type of laser is in a laser printer?
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