The average power of a wind turbine is 3 MW. One house consumes an average of 16,000 kW. h per year.
1. Express in joules (j) the average annual energy consumed by this dwelling.

2. Find the number of homes that can be powered by a wind turbine.
Hint: 1 MW = 106 W

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.