water is forced through a hydraulic system by a pump. an air chamber is used to maintain a continuous flow of water during upstroke and downstroke of the piston pump . explain how the continuous flow of water is maintained​

What kind of simple machine is a catapult?

Select the correct answer. what does the process of natural selection involve?

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm