5. ||| The earth's radius is about 4000 miles. Kampala, the capital of Uganda, and Singapore are both nearly on the equator. The distance between them is 5000 miles.

1. Through what angle do you turn, relative to the earth, if you fly from Kampala to Singapore? Give your answer in both radians and degrees.
2. The flight from Kampala to Singapore takes 9 hours. What is the plane's angular speed relative to the earth?

7.||||| A turntable rotates counterclockwise at 78 rpm. A speck of dust on the turntable is at ? = 0.45 rad at t= 0 s. What is the angle of the speck at t = 8.0 s? Your answer should be between 0 and 2? rad.

11. | The 1.00-cm-long second hand on a watch rotates smoothly.

1. What is its angular velocity?
2. What is the speed of the tip of the hand?

21. | What is the net torque about the axle on the pulley in Figure P7.21?