Problemsolving1_class

# Problemsolving1_clas - Two identical conducting small spheres are placed with their centers 0.300 m apart One is given a charge of 12.0 nC and the

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Two identical conducting small spheres are placed with their centers 0.300 m apart. One is given a charge of 12.0 nC and the other a charge of –18.0 nC. (a) Find the electric force exerted by one sphere on the other. (b) What If? The spheres are connected by a conducting wire. Find the electric force between the two after they have come to equilibrium. Two small silver spheres, each with a mass of 10.0 g, are separated by 1.00 m. Calculate the fraction of the electrons in one sphere that must be transferred to the other in order to produce an attractive force of 1.00 × 104 N (about 1 ton) between the spheres. (The number of electrons per atom of silver is 47, and the number of atoms per gram is Avogadro’s number divided by the molar mass of silver, 107.87 g/mol.) In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is 0.529 × 10 –10 m. (a) Find the electric force between the two. (b) If this force causes the centripetal acceleration of the electron, what
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## This note was uploaded on 11/26/2010 for the course PHYS 205 taught by Professor Valterzazubuv during the Spring '10 term at Concordia University Irvine.

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