A projectile is fired from the edge of cliff , with initial velocity component of v0x=60 and v0y=175 . The projectile rises and then falls into sea. time of the flight of projectile is 40.0 s. what is the height of the cliff of the air resistance is negligible

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.