Asystem consists of two charges,
and 109. the force exerted on charge q has a magnitude
of f. does the force exerted on the charge 10 q have a
magnitude that is greater than, less than or equal to f?
explain.

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.