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MMLU-Pro / 9805 / A shower of protons from outer space deposits equal charges +q on the earth and…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

A shower of protons from outer space deposits equal charges +q on the earth and the moon, and the electrostatic repulsion then exactly counterbalances the gravitational attraction. How large is q?

category

physics

options

  1. R^2
  2. GM_eM_i
  3. 2GM_eM_i
  4. q^2 / R^2
  5. (GM_eM_i)^2
  6. q / (4πε₀R^2)
  7. (G^2M_eM_i) / R
  8. qR^2
  9. (GM_eM_i)/R
  10. \surd(GM_eM_i)

src

stemez-Physics

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Source and history

Official source

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