Asmall shpher with charge q_a = +5.70 mu c is at the origin, and a second sphere with charge q_b = -3.20 mu c is loaded at x = 2.50 m. at what finite distance from the origin is the electric field equal to zero?

An ideal gas is held in a container at constant volume. initially, its temperature is 5 degrees c and its pressure is 1.2 atm. what is its pressure when its temperature is 43 degrees c? answer in units of atm

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.

Most of the volume of an atom is occupied by the