01:39:21 2011
Newton's third law of motion says that for every action there is a(n)
and opposite reaction.
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Newton’s third law of motion

What is the coefficient of kinetic friction μk between the block and the tabletop?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

The two metal spheres in the figure are connected by a metal wire with w switch in the middle. initially the switch is open. sphere 1, with the larger radius, i'd given a positive charge. sphere 2, with the smaller radius, is neutral. then the switch is closed. afterward, sphere 1 has charge q1, is at potential v1 and the electric field strength at its surface is e1. the values for sphere 2 are q2, v2, and e2. a. is v1 < ,> , or = to v2? explain. b. is q2 < , > , or = explain? c. is e1 < ,> ,or = to e2? explain?