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Which one of the following is not a major fossil fuel?

Of the energy topics we’ve covered this semester, which one does not impact our water supply

A merry-go-round with a mass of 150 kg is coasting at 3.0 rad/s. Think of the merry-go-round as a solid cylinder with a radius is 3.0 m. A 45kg kid is riding the merry-go-round, standing on its rim. Just after the kid steps radially off the merry-go-round, what is the angular velocity?

A turntable rotating at 78.0 rpm slows to 33.33 rpm in 5.0 revolutions. If the acceleration is constant, the time it takes for the angular speed to change is

Three identical cylindrical disks have a common axis.  Initially one of the disks is spinning.  When the three disks are brought into contact, they stick together.  Which of the following is/are true? (Choose all that are correct)

A police car is chasing another car that was used in a bank robbery. The police car has a mass that is 1.2 times the mass of the car it is chasing. The police car has a speed of 40.0 m/s, and the other car is traveling at 35.0 m/s. The police car rams the back of the robber’s car. Afterward, the police car is going 35.0 m/s. How fast would the robber’s car be going after the collision?

Two kids are at a swimming pool. They both start from rest, one dropping from the high diving board, and the other going down the slide. If the slide starts at the same height as the diving board, which kid is going faster when they hit the water? Ignore friction and air resistance.

Professor Lewin has a bowling ball (m = 7.0 kg) attached to the end of a 4.0 m long cord. The other end is affixed to the ceiling, allowing the ball to swing freely at the end of the cord. He pulls back the bowling ball so that the cord makes an angle of 60° with the vertical and drops the ball from rest. How fast is the ball going when the cord is vertical, at the bottom of the arc? Ignore air resistance and friction.

A 1 kg particle is moving at a constant speed of 10 m/s around a circle. The circle has a radius of 10 m. The net work done on the particle during one loop around the circle is (remember, circumference = 2πr)

In the blank spaces below, write the output produced by each line of the following program, as it would appear on the console. def claim(hear, good, song): print(hear, “plus”, song, “is greater than”, good) return hear + song def main(): hear = 4 song = 5 good = 12 walk = 90 talk = 19 feel = 23 good = claim(feel, song, feel) again = claim(good, hear, song) claim(talk, 14, feel) talk = claim(talk, again, walk) main() Line 1: [l1] Line 2: [l2] Line 3: [l3] Line 4: [l4]