Two blocks of mass 3.50 kg and 8.00 kg are connected by a massless string that passes over a frictionless pulley (fig. p5.49). the inclines are frictionless. find (a) the magnitude of the acceleration of each block and (b) the tension in the string.

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.