Write 3 rules that describe the possible behaviors that occur when objects with different charges are brought close together

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.

Ajoint produces movement when its angle decreases. which type of movement is it?

Identify the type of chemical reaction that is described.