Question

state and Prove the law of conservation of the energy? Define power give its SI unit

Answer 1

energy can neither be created nor be destroyed but converted into one form to another .. we all do work or our daily efforts for energy .
ex - conversion of electrical energy into light and heat energy by electric bulb.
transfer of 10% energy from one tropic level to next
POWER = work done / time taken
SI unit of power is wattt