Physics, 29.06.2019 23:40 antschilt519
The electric field near the surface of earth points downward and has a magnitude of 170 n/c. (a) compare the upward electric force on an electron with the downward gravitational force. (upward force / downward force) the gravitational force is is much larger. the electric force is is much larger. d both forces are equal. (b) what magnitude charge should be placed on a penny of mass 2 9 so that the electric force balances the weight of the penny near earth's surface?
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