21-38 the doped silicon. Compare the result from part (a) with the number of con

Question

21-38

the doped silicon. Compare the result from part (a) with the number of conduction electrons per unit volume of copper wire, assuming that each copper atom produces one free (conduction) electron. The density of copper is 8.96 g/cm3, and its atomic mass is 63.54 g/mol. Section 21.5 Two charged spheres are 8.00 cm apart. They are moved closer to each other by enough that the force on each of them increases four times. How far apart are they now? Two identically charged particles separated by a distance of 1.00 m repel each other with a force of 1.00 N. What is the magnitude of the charges? How far apart must two electrons be placed on the Earth's surface for there to be an electrostatic force between them equal to the weight of one of the electrons? In solid sodium chloride (table salt), chloride ions have one more

Explanation / Answer

4*kq1q2/8^2 = kq1q2/r^2

r = 8/2 = 4cm

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