A well acts as a closed pipe. When wind blows across the top, it
creates a fundamental frequency of
30.6 Hz. How deep is the well?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?

Which of the following best describes the circuit shown below?

What system does a dentist chair system use? pneumatic or hydraulic system?