What is the terminal speed at which the bar falls? assume the bar remains horizontal and in contact with the rods at all times?

I do not see a question. Could you be more specific?

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.