A 600 mW laser beam is polarized vertically. It then passes through two polarizers. The axis of the first polarizer is oriented at 45 degrees from the horizontal, and that of the second is oriented at 20 degrees from the horizontal. What is the power of the transmitted beam in mW

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.