A well acts like a closed pipe. When wind blows a crossed the top, it creates a fundamental frequency of 30.6 Hz. How deep is the well? Please explain!

an enlarged virtual image

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

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.

i think the answer would be reserve.