98. In Fig. 24-71, a metal sphere
with charge q = 5.00 uC and radius
r = 3.00 cm is concentric with a
larger metal sphere with charge Q =
15.0 uC and radius R = 6.00 cm. (a)
What is the potential difference be-
tween the spheres? If we connect the
spheres with a wire, what then is the
charge on (b) the smaller sphere and
(c) the larger sphere?

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?