The wave frequency is a measure of

A. the time required for the wave to travel a distance equal to its wavelength.

B. the maximum distance a molecule has been moved from its normal position.

C. The number of waves that pass a particular point in a unit of time.

D. the total distance traveled by the wave in a unit of time.

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.