What is the angular momentum of the moon about the earth? the mass of the moon is 7.35 x 10^22 kg, the center-to-center separation of the earth and the moon is 3.84 x 10^5 km, and the orbital period of the moon is 27.3 days. ignore the small offset of the center of mass of the system from the center of the earth in your calculation.

The one that is false in this case is 3) All EMR can be seen. We cannot see EMR that is below visible light with the naked eye.

However with this question, one thing that I would like to point out is that EMR only travels at the speed of light when it is in a vacuum a.k.a. air. Otherwise it doesn't travel at the speed of light because it could be refracted.