A planet has a mass one-third the mass of the Earth and a radius three times that of Earth. What is the acceleration due to gravity on the planet in terms of g, which is the acceleration due to gravity on Earth?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.