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Nitrogen in a piston-cylinder assembly undergoes a polytropic expansion process. Initially, nitrogen is at 125 C and 144 kPa. Then it is expanded to a state of 102 kPa and 90 C. determine the heat transfer and work for the process considering no change in Kinetic or Potential energy.
calculate the work done and the final temperature for the following processespolytropic n 1.0 1.0 kg of air t1 1470
his choice of route is independent of the weather. if it rains the probabilities of arriving late through route a b and
Determine the change in entropy for the following: Water, u=1000 kJ/kg, T=140 degree C to saturated liquid at p=3 bar. Air, T(1)= 500 degrees R, p(1)= 10 lbf/in^2 to T(2)= 900 degrees R, p(2)= 50lbf/in^2 (using air property tables and specific heat m..
a valve in a cylinder has a cross sectional area of 11 cm2 with a pressure of 735 kpa inside the cylinder and 99 kpa
an 800 ft ship has a displacement of 35000 tons and the area defined by the waterline is 38000 ft2. will the ship take
a pipeline has been proposed to carry natural gas 1715 miles fro alaskas north slope to calgary alberta canada. the
For a vehicle in gravitationless space, determine the mass ratio necessary to boost the vehicle velocity by 1600 m/sec; the effective exhaust velocity is 2000 m/sec and the initial total vehicle mass is 4000 kg.
brass balls each of mass 0.258 kg and initially at 130degc are quenched in a water bath at 50degc for 2 minutes at a
an air standard brayton closed cycle receives air at 1 atm and 298 k. the upper temperature and pressure limits are 5
suppose you are outside on a cold day with no gloves. assume your hands have an area of 0.01 m2. the temperature of
three kg of water in a piston-cylinder apparatus is initially in the saturated liquid state at 0.6 mpa. energy is added
water is flowing through a gradual constriction in a pipe. the upstream diameter of the pipe is d14cm and the
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