A hollow cube of copper that is 23.36cm on a side and 2.4mm thick is placed...

A hollow cube of copper that is 23.36cm on a side and 2.4mm thick is placed next to a small solid ball of plutonium-239. Its so small that it does not explode (criticallity), having a mass of only 23.78g. It is slightly warm to the touch (due to nuclear decay...alpha particles heat the skin).

(a) How many copper atoms are there making up the cube?

(b) What is the mass of the copper?

(c) What is diameter of the ball of plutonium?

(d) Look up the meanlife of plutonium-239. Compute the number of plutonium atoms in that ball that decay per second by dividing the total number of atoms by the meanlife.

(a) atoms

(b) Kg

(c) m

(d) decays

Expert Solution

genius_generous answered 2 years ago

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