Which statement best describes what will occur if enough thermal energy is removed from the system to cause a cha А Molecular energy will decrease, and the substance will change from a gas to a liquid.
B
Molecular energy will increase, and the substance will change from a gas to a liquid.
C
Molecular energy will decrease, and the substance will change from a liquid to a gas.
D
Molecular energy will increase, and the substance will change from a liquid to a gas.

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.