Car b starts at point x and moves clockwise around a circular track at a constant rate of 2 mph. ten hours later, car a leaves from point x and travels counter-clockwise around the same circular track at a constant rate of 3 mph. if the radius of the track is 10 miles, for how many hours will car b have been traveling when the cars have passed each other for the first time and put another 12 miles between them (measured around the curve of the track)?

What’s #16 asking and how do i solve it?

Arrange the images in order to show how lake-effect snow occurs.

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