An electron confined to a one-dimensional box of width 0.52 nm by infinite potential energy barriers emits a photon when it makes a transition from the third excited state to the ground state. Find the wavelength of the emitted photon (in nm).

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.