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Consider an infinitesimal reversible adiabatic compression or expansion process. By taking s = s(P, v) and using the Maxwell relations, show that for this process Pvk = constant, where k is the isentropic expansion exponent defined as k = v/P (?P/?) Also, show that the isentropic expansion exponent k reduces to the specific heat ratio cp /cv for an ideal gas.
a hair dryer is basically a duct of constant diameter in which a few layers of electric resisiotrs are placed. a small
the conduit between the turbine and nozzle nozzle output of an engine is 0.60 m in diameter. the gas has a pressure and
A rigid tank is divided into two equal parts by a partition. One part of the tank contains 3.1 kg of compressed liquid at 400 kPa and 60 degrees Celcius while the other part is evacuated. The partition is now removed, and the water expands to fill th..
Atmospheric air at T = 40°C with a free stream velocity u = 8 m/s flows along a flat plate L = 3 m long which is maintained at a uniform temperature of 100°C. Calculate the average heat transfer coefficient over t
1 calculate the density of al in gcm3 given that it forms an fcc crystal structure with an atomic radius of 0.143 nm
a rod has a cross sectional area of 1 cm2. its material has the following strength properties beyond which it breaks
two blocks of rubber with a modulus of rigidity g 5 12 mpa are bonded to rigid supports and to a plate ab. knowing that
a flow of 0.5 kgs superheated steam at 5 mpa 400c and a flow of liquid water at 5 mpa 40c are mixed. if saturated
assume that in a certain area the atmospheric lapse rate ?gamma subscript actual is equal to zero from the ground up to
1kg of fluid is compressed reversibly according to a law pv0.25 where p is in bar and v is in m3kg. the final volume is
Determine the COP of the heat pump that applies energy to a house at a rate of 4500kj/h for each kW of electric power it draws. Also, determine the rate of the energy absorption from the outdoor air.
water at 30 c is pumped from 100 kpa to 5mpa in a pump with an efficency of 72. what is the ideal pump work and the
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