Tag: How to Questions
Why are the windmills mounted on top of tall poles? Continuous flow of air is a must for the windmill to work and produce energy. The wind blows more …
Why are the satellite dishes large and curved? Since the signals received from the satellites are very weak, large curved dishes are used as collectors of these signals. They …
Why is the boiling point of a liquid lowered at high altitudes? A liquid boils when the (upward) pressure exerted by its vapours and the (downward) pressure exerted by …
Why does the sky appear red or orange in colour at sun-sets? At sunset, the sunlight has to travel a longer distance through the atmosphere before it reaches us. …
Why can’t Benzene be used as a thermometric liquid even though it is a more sensitive liquid than Mercury? Benzene can expand about six times more than Mercury for …
Why are unmanned spacecrafts sent into space? Many unmanned spacecrafts like Pioneer 10, Voyager 1, Voyager 2 etc. have been sent into space to study the parts of the …
Why are CDs preferred to other forms of recording? Sound information, recorded in CDs through digital coding is very accurate, free of noise and gives excellent sound quality. They …
Why is Charles Babbage known as the ‘Father of Computers’? Charles Babbage (1792-1891) was an English mathematician. He spent most of his life developing the two calculating machines—the Difference …
