What factors affect an object's resistance to rotational motion? question: pre-laboratory work: part p-1: 1. in part 1 of the lab you experience how different masses balance. from your life experiences write down some application of balancing things in this way. explain your answer. in part two you use an apparatus. this apparatus models in some ways a part of the human body. what part of the human body is this? explain your answer. 2. in your group discuss the answers to the first two answers. write down your reactions your lab partners responses. if you all had the same answers. as a group develop a few additional answers to part one. write that down here as well.

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