What is the potential energy of a rock that weighs 10.0 kg and is sitting on top of a hill 100 meters high?l

What is a subatomic particle with a negative charge and very little mass?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?