How long does it take for the moon to orbit around the Earth?(no copied answer)

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?