What do we mean by the event horizon of a black hole?
a) it is the place where x rays are emitted from black holes. b) it is the very center of the black hole. c) it is the point beyond which neither light nor anything else can escape. d) it is the distance from the black hole at which stable orbits are possible.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

How do the measurements of charge at the different locations on the sphere compare to each other? the charge measurements are different at all locations on the sphere. the charge measurements are virtually not the same at all locations on the sphere except for the charge at the very top and at the very bottom that are equal. the charge measurements are virtually the same at all locations on the sphere except for the charge at the very top. at the top, the conductive sphere has a small disk that is made of different material. the charge measurements are the same at all locations on the sphere. what happens to the charge on the conductive sphere when it is connected to a source of charge such as the electrostatic voltage source? nothing will happen because no charge goes around the surface of the sphere. the charge on the conductive sphere spreads out over the surface of the sphere; being greater in some specific locations on the sphere. the charge on the conductive sphere spreads out uniformly over the surface of the sphere. the charge on the conductive sphere spreads out non-uniformly over the surface of the sphere.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer