The planet Gallifrey has 2 times the gravitational field strength and 2 times the radius of the Earth. How does the mass of the planet Gallifrey compare with the mass of Earth?

What are igneous intrusions and extrusions

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

In a system, when potential energy decreases, then entropy also decreases. true false