Question

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what does conservation mean in physics?

1. protecting something
2. something stays the same
3. a change in momentum
4. something changes

Explanation:

In physics, conservation refers to a physical quantity that remains constant (does not change) in a closed system, even as processes occur within that system. The other options do not match this definition: "Protecting something" is the general non-scientific definition of conservation, "A change in momentum" describes a force-related event, and "Something changes" is the opposite of the physics definition.

Answer:

1. Something stays the same