Water is the working fluid in a rankine cycle. steam enters the turbine at 1400 lbf/in^2 and 1000 degrees f. the condenser pressure is 2 lbf/in^2. both the turbine and pump have isentropic efficiencies of 85%. the working fluid has negligible pressure drop in passing through the steam generator. the net power output of the cycle is 1x10^9 btu/h. cooling water experiences a temperature increase from 60 degrees f to 76 degrees f, with negligible pressure drop, as it passes through the condenser. determine for the cyclea) the mass flow rate of steam, in lb/hb) the rate of heat transfer, in btu/h, to the working fluid passing through the steam generator. c) the thermal efficiency. d) the mass flow rate of cooling water, in lb/h

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?