A convex lens of crown glass has a focal length of 15 cm. The lens is placed in water. Determine whether the lens behaves as converging or diverging lens and determine it's focal length. With explanation​

An observer that stands still as the electron moves by him, will observe

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.