Why Newton law of gravitational force is called universal law
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Newton's law of gravitational holes good irrespective of the nature of two bodies., i.e., big or small, at all times, at all locations and for all distances in the universe.

Explanation:

It is called so because it is applicable on all bodies having mass, and the bodies will be governed by the same law, that is newton's law of gravitation. Thus, as it is applicable universally, it is called as universal law.

the answer is to check all of them! they all apply well at least i think so!

this could be newton#'s law of cooling. the cooling curve is exponential