The source of energy in a hydroelectric power station is:
Why does a gun recoil after firing?
A bomb explodes on the moon. You will hear its sound on earth after _________
Every hot object emits _______
What is the use of concave mirror?
A transformer is a device that converts________ .
in the resistance colour code the fourth band signifies
Wind rose represents
Superconductivity means _____.
Steel is more elastic than rubber because it ______.
