Along straight wire of circular cross section with radius r_0 carries current i and is immersed in a large volume of water. the wire is nonmagnetic. calculate the magnetization m(x) in the water. (the susceptibility is -9.0 times 10^-6) what is the bound current density j_b (x) for r > r_0? calculate the total current (free plus bound).

Why do electron microscopes have higher resolving power than light microscopes?

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Two trains leave a station at the same time, train a travels at a constant speed of 16 m/s. train b starts at 8.0 m/s but accelerates constantly at 1.0 m/s squared. after 10.0 seconds, which train has the greater speed?