Question

Why energy in the universe is said to be constant? (Law of thermodynamics)

Answer 1

Answer:

the total amount of energy in existence has always been the same

Answer 2

Explanation:

Energy can be changed from one form to another, but it cannot be created or destroyed. The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.