A comet of mass 1.20 3 1010 kg moves in an elliptical orbit around the Sun. Its distance from the Sun ranges
between 0.500 AU and 50.0 AU. (a) What is the eccentricity of its orbit? (b) What is its period?

Most short-period comets do not have randomly oriented orbits because

The movement of electrons between atoms is called an

3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?