What Is Energy?
Energy is the power to act. There are several different forms of energy, and one kind can be changed into another kind. But although it can
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Energy
How Does a Tuning-fork Work?
A tuning-fork vibrates to give a musical note of definite pitch or frequency and is marked on the fork by a letter or symbol referring to it
Where Will Water Boil at a Low Temperature?
Water will boil anywhere, but it boils at different temperatures in different places. For example, it will boil at a lower temperature up a
Where Does the Wax Go When Candles Burn?
Nowhere-it simply changes into other substances. That is what burning does to everything. The moment you put a match to the wick, you start
Why Star Is Called a Body of Luminous Gas?
A star is a body of luminous gas, like the sun. But as the stars are much farther away from the earth than the sun, they appear to be only s