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Air enters a regenerator at a pressure of 1MPa, temperature of 550 K and mass flow rate of 800 Kkg/min. Heat is transfered to the air at a rate of 3200 KJ/s. Exhaust gases enter the regenerator at a pressure of 140 KPa, temperature of 800 K and leave at a pressure and temperature of 130 KPa and 600 K. Treat exhaust gases as air.
a hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. a small
If the filling is done rapidly, calculate the final temperature in the small cylinder, (a) assume that oxygen is an ideal gas with Cv= 5R/2 and (b) using accurate thermodynamic data for oxygen.
A tank with a flat bottom is filled with water to a height of 3.5 meters. what is the pressure at any point at the bottom of the tank? (You can ignore atmospheric pressure when calculating your answer.)
Carbon content of steel, A steel contains 55% alpha-ferrite and 45% gamma-ferrite or austenite at 750 degrees celcius. What is the carbon content of steel?
a thermoelectric device cools a small refrigerator and discards heat to the surroundings at 25c. the maximum electric
how much heat is needed to a 0.3m3 rigid volume containing saturated water vapor at 1000 kpa in order for final
design a stationary steam power plant operating on an ideal closed loop rankine cycle that can deliver 85 mw of net
thermal convection in the presence of heating can be modelled bydtdt u dtdx v dtdy qcp k d2tdx2 d2tdy2 all are
heat is generated uniformly inside a 20-mm thick plane wall at a rate of 20000 wm3. the thermal conductivity of the
a chemical rocket is used for launch into earth orbit. at the end of the combusion chamber the stagnation temperature
a copper specimen is cold worked at room temperature and annealed at 100-400c. draw schematic sketches showing how
a tensile test is run on a 0.625 inch diameter specimen of astm-36 structural steel that has a 2.1 inch gage length.a
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