An air column of length L= 1.25 sustains a standing wave with a displacement antinode (pressure node) at one end and a displacement node (pressure antinode) at the opposite end. In between the two ends exist two pressure nodes. What is the harmonic index n of this standing wave?

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.