The combination of an applied force and a friction force produces a constant total torque of 36.0 n, m on a wheel rotating about a fixed axis. the applied force acts for 6.00 s. during this time the angular speed of the wheel increases from 0 to 10.0 rad/s. the applied force is then removed, and the wheel comes to rest in 60.0 s. find (a) the moment of inertia of the wheel, (b) the magnitude of the frictional torque, and (c) the total number of revolutions of the wheel.

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?