일반물리학 2 — Coulomb's Law: Problem 17

17 Earth’s atmosphere is constantly bombarded by cosmic ray protons that originate somewhere in space. If the protons all passed through the atmosphere, each square meter of Earth’s surface would intercept protons at the average rate of 1500 protons per second. (a) What would be the electric current intercepted by the total surface area of the planet? (b) How much charge would be collected per day?