I have the answer is B but can someone explain why with the rule?

At what point the certain object feels zero garvitational force between earth and the moon. take the required information from the book.required: distance away from earth or moon

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?