Afour-cylinder, four-stroke internal combustion engine has a bore of 3.7 in and a stroke of 3.4 in. the clearance volume is 16% of the cylinder volume at bottom dead center and the crankshaft rotates at 2400 rpm. the processes within each cylinder are modeled as an air-standard otto cycle with a pressure of 14.5 lbf/in.2 and a temperature of 60f at the beginning of compression. the maximum temperature in the cycle is 5200r. based on this model, calculate the net work per cycle, in btu, and the power developed by the engine, in horsepower.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?