Why do motors have anti-condensation heaters? Don't say to stop condensation!! I think they only really need them in certain climates ( I think it's hot) but I can't remember the theory.
what is the speed of gravity? if an object the size of the sun were suddenly to appear how long would it take for an object say 10 light years away to feel the gravitational pull from it? is it the...
How could the inventor of the Telivision Baird confirm that his invention worked as i am assuming that there were no broadcasts at the time and the VCR came much later. He would have had to build a...