Aparticle with mass m is confined to move on a circle of radius r. it is perturbed by a potential v(0)a(1+cos(20). (a) what are the unperturbed energy levels? (b) find the shift in the energy levels to first order in a c) find the second order energy shift for all the states. hint: beware of the special care needed for some of the states.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? a.positive force, balanced force, negative force b.negative force, balanced force, positive force c.positive force, unbalanced force, negative force d. negative force, unbalanced force, positive force