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A piston-cylinder assembly contains a two-phase liquid-vapor mixture of ammonia initially at 500 kPa with a quality of 98%. Expansion occurs to a state where the pressure is 150 kPa. During the process the pressure and specific volume are related by pv=constant. For the ammonia, determine the work and heat transfer per unit mass, each in kJ/kg.
A petroleum engineer estimates that the present production of 400,000 barrels of oil during this year from a group of 10 wells will decrease at the rate of 15% per year for years 2 through 10. Oil is estimated to be worth $25 per barrel. If the inter..
a rigid insulating tank that is initially evacuated is connected through a valve to a supply line that carriers helium
consider the steady operation of a refrigeration package for a shipping container on a train truck or ship. the package
a stoped out area with a volume of 20000 m3 is to be used as a receiver. it is to be charged to an absolute pressure of
briefly explain a why there may be significant scatter in the fracture strength for some given ceramic material and b
A tank contains a two-phase liquid-vapor mixture of Refrigerant 22 at 10 bar. The mass of saturated liquid in the tank is 25 kg and the quality is 60%. Determine the volume of the tank, in m^3, and the fraction of the total volume occupied by saturat..
a piston-cylinder device initially contains 0.07m3 of nitrogen gas at 130kpa and 120 degrees celsius. the nitrogen is
air enters a constant-diameter tube with an average velocity of 2 ms at a temperature of 400 k and a pressure of 0.12
it is desired to study the effect of turbine inlet temperature on the performance of an ideal steam rankine cycle.
Calculating temperature, water evaporation, and heat in a power plant cooling situation. In a nuclear power plant the cooling tower system must be run on a closed cycle.
two steel e30000 ksi pipes 1 and 2 are connected at flange b. pipe 1 has an outside diameter of 6.625 in. and a wall
a steel plate of 12-in outer diameter is fabricated from 14in thick plate by welding along a helix that forms an angle
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