Acapacitor with plates separated by distance d is charged to a potential difference δvc. all wires and batteries are disconnected, then the two plates are pulled apart (with insulated handles) to a new separation of distance 2d. part a does the capacitor charge q change as the separation increases? if so, by what factor? if not, why not?

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.