[2 points] A child of mass 23.6 kg in a boat of mass 36.8 kg…

[2 points] A child of mass 23.6 kg in a boat of mass 36.8 kg is at rest on the water. The child throws a package out horizontally with a speed of 9.46 m/s. The recoil speed of the boat and the child together is 1.07 m/s. What was the mass of the package in kg?

Miami is at lower elevation than Denver. If a pendulum clock…

Miami is at lower elevation than Denver. If a pendulum clock keeps perfect time in Denver, will it run fast or slow in Miami? (Note: “runs fast” means 1 second (1 period) on the clock in Miami is shorter than on the clock in Denver; “runs slow” means 1 second (1 period) on the clock in Miami is longer than on the clock in Denver.)