Consider a solid conducting sphere with radius a and charge Q1 and a concentric conducting spherical shell with inner radius b > a , outer radius c and a net charge Q 2 .

Denote the charge on the inner surface of the shell by Q'2 and on the outer surface by Q??2
1. find the charge Q''2
2. Find the magnitude of the electric field at point P (||EP|| ? EP) , where the distance from
P to the center is (a+b)/2
3.Find the potential VP at point P. Assume the potential at r=?is zero

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation

Mixing salt in water is an example of physical change