Question

6. Assertion : Mass remains constant at every
point in universe
Reason: Mass of a body can never be zero​

Answer 1

Answer:

Assertion and reason both are true but reason is not the correct explanation of assertion

Answer 2

Answer:

the assertion is false but the reason is true.

Explanation:

• since mass and energy are the same according to Einstein's equation, I would say that mass is not constant for the universe because the law of conservation of energy has been proven false. It is so because the space itself in which the processes take place is expanding.
• Mass is actually the quantity of matter contained in a body. It is measured in kg and the smaller unit is grams. It is a scalar quantity. It can never be zero as everything has certain mass.