What is the wavelength of a wave whose velocity is 12m/s and has a frequency of .75 Hz?

Amanometer is used to measure the air pressure in a tank. the fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 34 in. if the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in