To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its
a. wavelength.
b. intensity.
c. refraction.
d. amplitude.

To a of 4 x hz is 1. 0. mm nm nm

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

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.