In a radio, frequency modulation refers to encoding a wave with information by:

a) adjusting the height of the waves
b) adjusting how many waves are produced per second
c) turning the wave on and off
d) changing the medium in which the waves travel

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.