Asatellite is placed in a circular orbit with a radius equal to one-third the radius of the moon's orbit. what is its period of revolution in lunar months? (a lunar month is the period of revolution of the moon.)

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.