Which one of the following accurately describes the force of gravity? a. the gravity acceleration has no effect on a body moving in directly the opposite direction of the force of gravity. b. the force of gravity is slightly lower at the bottom of a mountain than it is at the top. c. the gravity acceleration is in the same direction as the force of gravity, and thus toward the center of the earth. d. the gravity acceleration is in the same direction as the force of gravity, and thus away from the center of the earth.

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0