Rita jogs on a track 120 m in length. She moves from one end to another and then back to the same point in 1 minute. What are Rita’s average speed and the average velocity?

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j