A thin-walled metal spherical shell of radius a = 5 m has a charge qa = 31 C. Concentric with it is a thin-walled metal spherical shell of radius b = 7a and charge qb = 33 C. Find the electric field at points a distance r from the common center, where (a) r = 1.5 m, (b) r = 10 m, and (c) r = 52.5 m.

State the following: boyle's law and charle's law

Which type of heating system is used to heat many buildings from a central location?

|| communications satellites are placed in circular orbits where they stay directly over a fixed point on the equator as the earth rotates. these are called geosynchronous orbits. the altitude of a geosynchronous orbit is 3.58 * 107 m (22,000 miles). a. what is the period of a satellite in a geosynchronous orbit