An earthquake is what happens when two blocks of the earth suddenly slip past one another. the surface where they slip is called a a) fault. b) epicenter. c) foreshock. d) tectonic plate.

Fault

Explanation:

The answer is fault because A fault is formed in the Earth's crust as a brittle response to stress. Generally, the movement of the tectonic plates provides the stress, and rocks at the surface break in response to this. Faults have no particular length scale.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.