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A mass of 8 kg gas expands within a flexible container so that the p–v relationship is the form of pvl.2 = constant. The initial pressure is 1000 kPa and the initial volume is 1 m3. The final pressure is 5 kPa. If specific internal energy of the gas decreases by 40 kJ/ kg, find the heat transfer in magnitude and direction.

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Nuclear Physics


A stationary system consisting of 2 kg of the fluid expands in an adiabatic process according to pvl.2 = constant. The initial conditions are 1 MPa and 200°C, and the final pressure is 0.1 MPa. Find W and Δ E for the process why is the work transfer not equal to ∫ PdV?

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Nuclear Physics


Convert the following readings of pressure to kPa, assuming that the barometer reads 760 mmHg: (a) 90 cmHg gauge (b) 40 cmHg vacuum (c) 1.2 m H2O gauge (d) 3.1 bar

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Nuclear Physics


Assume that the pressure p and the specific volume v of the atmosphere are related according to the equation pv1.4 = × 2.3 105 where p is in N/m2 abs and v is in m3/kg. The acceleration due to gravity is constant at 9.81 m/s2. What is the depth of atmosphere necessary to produce a pressure of l.0132 bar at the earth’s surface? Consider the atmosphere as a fluid column.

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Nuclear Physics


A vacuum gauge mounted on a condenser reads 0.66 mmHg. What is the absolute pressure in the condenser in kPa when the atmospheric pressure is 101.3 kPa?

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Nuclear Physics


A pump discharges a liquid into a drum at the rate of 0.032m3/s. The drum, 1.50 m in diameter and 4.20 m in length, can hold 3000 kg of the liquid. Find the density of the liquid and the mass flow rate of the liquid handled by the pump.

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Nuclear Physics


A new scale N of temperature is divided in such a way that the freezing point of ice is 100°N and the boiling point is 400°N. What is the temperature reading on this new scale when the temperature is 150°C? At what temperature both the Celsius and the new temperature scale reading would be the same?

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Nuclear Physics


A mass of gas is compressed in a quasi-static process from 80 kPa, 0.1 m3 to 0.4 MPa, 0.03 m3. Assuming that the pressure and volume are related by pvn = constant, find the work done by the gas system.

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Nuclear Physics