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Manufacturing Engineering

Thermodynamics Problem Set

1. Air in a piston/cylinder expands reversibly and adiabatic. The initial temperature is 507K and the pressure is 600Kpa. The final pressure is 120Kpa. Find a) Final temperature assuming constant specific heat. b) Work c) Mass of the air in kg 2. 30,000 kj/h is needed for a heat pump to maintain a building at 20 degrees Ce

Hydraulic Chairs

What mechanisms are used in raising or lowering chairs with hydraulic lifts?