I need help on this question

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

What is the measure of a change in an objects velocity?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .