Two animals that can be found at the grand canyon include the abert’s and kaibab squirrels. the abert’s squirrel is found at the south rim of the canyon and in a few surrounding states. the kaibab squirrel, however, can only be found at the canyon’s north rim, mainly on the kaibab plateau. the kaibab squirrel is not found anywhere else in the world. scientists believe that the squirrels are actually closely related and have developed separately as a result of geographic isolation. it is possible that the squirrels were separated by plateau erosion that separated the forests and isolated the kaibab population. some scientists are studying if the squirrels are now two separate species or if the kaibab squirrel is simply a subspecies of the abert’s squirrel. separate species are unable to reproduce with each other. which evidence would be used to support the claim that the squirrels are two separate species?

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