Determine the boundary work done during the process
A piston-cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 120 oC. The nitrogen is now expanded polytropically to a state of 100 kPa and 100 oC. Determine the boundary work done during this process. (R = 0.297 kJ/kgK).
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Estimate the critical value of t for a 99% confidence interval with degrees of freedom (df) equal to 102.
Ignoring the heat transfer, changes in potential energy, and the kinetic energy in inlet, calculate (a) The power output from this turbine, in kW. (b) The cross-section area of the exit, in m2.
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A piston-cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 120 oC. The nitrogen is now expanded polytropically to a state of 100 kPa and 100 oC.
These capacitors are then disconnected from their batteries, and the positive plates are now connected to each other and the negative plates are connected to each other. What will be the potential difference across each capacitor?
Assume ends of bar in 5-7 have been kept constanst at 100 degrees C for a long time. Then at some instant t=0 the temperature at x=L is suddenly changed to 0 degree C and kept there.
A room with 42 kg of dry air has 1 kg of water vapor. If the enthalpy of the water vapor at 31 deg Celcius is 3,406 kJ/kg, determine the enthalpy of the air per unit mass of dry air in kJ/kg dry air.
A major airline recently began encouraging reservation agents to nap during their breaks. The table below lists the number of complaints received about each of a sample of 10 reservation agents during the 6 months before naps were encouraged and d
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