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A tank of 0.5 m^3 volume contains compressed air. A valve is opened and air escapes with a velocity of 300 m/s through an opening of 130 mm^2 area. Air temperature passing through the opening is -15ºC and the absolute pressure is 350 kPa. Find the rate of change of density of the air in the tank at this moment.
air enters the compressor of a gas turbine at 100 kpa 300 k and a volumetric flow rate of 5.0 m3s. the air is
Find the turbine's (b) isentropic efficiency (%), (c) reversible work (kJ/kg), (d) irreversibility(kJ/kg), and (e) exergy destruction (kJ/kg). (f) Draw a T-s diagram of the process
Determine the smallest horizontal force required to lift the 260- crate. The coefficient of static friction at all contacting surfaces is = 0.7. Neglect the mass of the wedge.
air at 80 degrees fahrenheit and 80 percent relative humidity is cooled to 51 degrees fahrenheit at a constant pressure
calculate the reynolds number for water dynamic viscosity of 7.98 10-4 nsm2 flowing through a rectangular pipe 4 cm
a deep-water oil rig has just collapsed into the gulf of mexico. its blowout -preventer system has failed so thousands
a 6 nominal pipe size schedule 40 pipe hase a chamfered entrance and 200 ft long. the velocity is 20 ftsec. after the
capacitor with capacitance 6.00 microf is connected to a resistor with r 780 o in series and an emf source of 25.0 v
Aluminum-lithium alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. A commercial aircraft skin material having a density of 2.47 g/cm3 is desired. Compute the concentration of Li (..
refrigerant r-134a with a mass of 0.08 kg is expanded adiabatically from a superheated vapor at 10 bar 40 c to a
one kilogram of saturated liquid methane at 160 k is placed in an adiabatic piston-and-cylinder device and the piston
r-134a is loaded into a weighted pistoncylinder unit. the mass of refrigerant is 10 kg. before heating measurements
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