)points will be awarded and brainiest answer if its correct! sam and sally are both running the mile at the region track meet. one mile equals four laps around the oval track. they are neck and neck during most of the race, but at the half-mile mark sam starts to pull ahead. he wins the race with a time of 5 minutes 25 seconds. sally stops at .9 miles to have a drink of water and then continues to the finish line. how does sam and sally's displacement compare for the race? a) their displacement is the same, zero miles. b) sam's displacement is greater than sally's. c) sally's displacement is greater than sam's. d) both sam and sally's displacement is 1 mile.

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