Show the time derivative of the expectation value of momentum is equal to (up to a minus sign) the expectation value of the x-derivative of the potential energy.

Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?