A negative test charge −q is released from rest at a distance r away from a sphere of charge +Q, and a distance 2 r away from a sphere of charge +2Q. The charged spheres are fixed in place. System of charges arranged in a horizontal line. Test charge minus Q is in the middle position. Charge plus Q located a distance R to the left. Charge +2Q located a distance 2R to the right. In what direction does the test charge move immediately after being released?

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

Determine the maximum r-value of the polar equation r =3+3 cos 0

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.