The nucleus of a hydrogen atom, a proton, sets up an electric field. The distance between the proton and electron is about 5.1 × 10^-11 m. What is the magnitude of the electric field at this distance from the proton? [The charge on the proton is +1.6 × 10^-19 C.]
5.5 × 10^11 N/C
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When comparing geologic time to a calendar year, the time of the dinosaurs is in the
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To kick a football so it won't topple end over end, kick it so the force of impact extends
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A. It increases by a factor of 4.
B. It increases by a factor of 2.
C. It increases by a factor of .
D. It decreases by a factor of 2.
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