If a hydrogen atom has its electron in the n=4n=4 state, how much energy in eV is needed to ionize it?

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

where are the choice options?