A0.50-kg object moves in a horizontal circular track with a radius of 2.5 m. an external forceof 3.0 n, always tangent to the track, causes the object to speed up as it goes around. thework done by the external force as the mass makes one revolution is:

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 .