Which of the following are located outside the nucleus of an atom? Select all that apply.
Electrons
Protons
Neutrons
Nonsense! None of these are located outside the nucleus of the atom.

Suppose that a cylindrical tank 6 meters high with a radius of 2 meters is filled to the rim with water. the tank is buried so that the top of the tank is 1 meter below ground level. the space above the tank is not filled with water. calculate how much work needs to be done by a pump to pump the water out of the tank up to ground level. (the water weighs 9,800 newtons per cubic meter.)