Agas within a piston-cylinder assembly executes a carnot power cycle during which the isothermal expansion occurs at th 5 600 k and the isothermal compression occurs at tc 5 300 k. determine (a) the thermal efficiency. (b) the percent change in thermal efficiency if th increases by 15% while tc remains the same. (c) the percent change in thermal efficiency if tc decreases by 15% while th remains the same. (d) the percent change in thermal efficiency if th increases by 15% and tc decreases by 15%.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent