Taking a rest one or two days in between training sessions helps your body blank much faster

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

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.

Avoltaic cell converts chemical energy to