Acar engine moves a piston with a circular cross section of 7.200 ± 0.009 cm diameter a distance of 3.190 ± 0.001 cm to compress the gas in the cylinder. (express your answers to the correct number of significant figures.) (a) by what amount is the gas decreased in volume in cubic centimeters?

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?