Two charged bodies exert a force of 0.790n on each other., Ask an Expert

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Q. Two charged bodies exert a force of 0.790 N on each other. If they are moved so that they are one-fourth as far apart, what force is exerted?

Q. If the solar cells used have an efficiency of 10%, what area of land is needed to produce an output of 1000 MW? Assume that the mean insolation is 500 W/m^2.

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