A 3kg block rests on a horizontal table. A rope is attached to the block and is pulled with a force of 11N to the left. As a result, the block accelerates at 3m/s^2. The coefficient of kinetic friction µk between the block is__.

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

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?