The electric force that makes charge flow in a circuit is related to the

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

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?