Aforce causes a mass of 4 kg to have an acceleration of 8 m/s2. suppose something causes the mass to be one-quarter of its original amount. what will happen to the acceleration if the amount of force used remains the same?

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.