Mode A steel coire having length 8m and diameter
Umm is fixed befto een too rigid support:
Calculate increase in tension on a wire who
temperature falls by 40°c, where
of coire = 2X10power11N/msquare?, linear expansivity of
steel = 1.2x10power-5and Kelvin power-1

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.