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Who was the first scientist to measure speed as distance over time?

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this