Question

plz give me the correct answer friends ​

Answer 1

Answer:

the principle that in any closed system subjected to no external forces, the mass is constant irrespective of its changes in form;

the principle that matter cannot be created or destroyed.

Explanation:

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Answer 2

Answer:

1. In physics and chemistry, the law of conservation of momentum states that the momentum of an isolated system remains constant. Momentum is therefore said to be conserved over time; that is, momentum is neither created nor destroyed, only transformed or transferred from one form to another.
2. The equation for conservation of momentum looks like this: total momentum before = total momentum after. pbefore = pafter. (m1v1 + m2v2)before = (m1v1 + m2v2)after.