Water is the working fluid in a rankine cycle with reheat. the turbine and the pump have isentropic efficencies of 80%. superheated vapor enters the turbine at 10 mpa, 480 °c, and the condenser pressure is 6 kpa. steam expands through the first-stage turbine to 0.7 mpa and then is reheated to 480°c. determine for the cycle(a) the rate of heat addition, in kj per kg of steam entering the first-stage turbine.(b) the thermal efficiency.(c) the rate of heat transfer from the working fluid passing through the condenser to the cooling water, in kj per kg of steam entering the first-stage turbine.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

What precautions should you take to prevent injuries when dealing with heavy loads?

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.