In the diagram below, the uniform metre rule is pivoted at X and held up at the point Y by a rope.
rope
х
15 cm
95 cm
Given that the weight of the metre rule is 4.0 N, calculate the tension in the rope that
is needed to ensure that the ruler stays horizontal.

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?