The scattering of a stream of positively charged particles when striking a thin film of gold confirms that A the positive charge in an atom must be located in a dense central mass. B atoms contain electrons in varying energy layers around the nucleus. C electrons are found in the center of an atom. D electrons can only be found within predicted areas surrounding the nucleus.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?