Awave is moving at the rate of 40 cm/s. its wavelength is 8 cm. what is the frequency of the wave?

Work = force × a. work b. energy c. distance d. momentum

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

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.