A gold nucleus (radius r) is represented by the symbol 7, Au Taking e as the elementary charge and E, as
the permittivity of free space, what is the electric field strength at the surface of an isolated gold nucleus?
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The radius of a gold nucleus (Z=79) is about
. Assume that the positive charge is distributed uniformly throughout the the nuclear volume. Find the strength of the electric field at (a) the surface of the nucleus and (b) at the middle oint of a radius. Remembering that gold is a conductor, is it justifild to assume that the positive charge is uniformly distributed over the entire volume of the nucleus and does not come to the ourer surface?
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