A negative charge of - 4.0 x 10-5 C and a positive charge of
7.0 x 10 -5 C are separated by 0.15 m. What is the force
between the two charges?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

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.