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A refrigerator is situated in an insulated room; it has a 2-hp motor that drives a compressor. Over a 30 minute period of time the refrigerator dumps 8000 kJ of heating from the coils on its back to the room. Calculate the increase in internal energy in the system if the system is the room without the refrigerator. Calculate the increase in internal energy in the system if the system is the room with the refrigerator. How much heat is carried away from the space containing the food inside the refrigerator if the internal energy of the refrigerator (the solid structure) is unchanged during the process?
consider an ideal steam cycle that combines the reheat cycle and the generative cycle. the net power output of the
a 6 nominal pipe size schedule 40 pipe hase a chamfered entrance and 200 ft long. the velocity is 20 ftsec. after the
determine the radius r of an impurity atom that will fit into a tetrahedral site of bcc ironr1.241 angstroms crystal
Calculate the e?ciency of the furnace if the speci?c heat capacity of the water is cp = 4.2kJ/(kgK) and the zero level of enthalpy is at 0?C! (η = 79.6%)
Calculate the mass flow (in slugs/per second) that comes out the exit of the engine. The plane is at standard altitude 50,000 ft and velocity = 2200 ft/s. Would appreciate attack to problem.
a rigid well-insulated tank with a volume of 3 fe contains air at p1 22 lbfin2 and t1 475 bullr. the air is stirred by
a 600 mw coal-fired power plant has an overall thermal efficiency of 38. it is burning coal that has a heating value of
Using the required parameters for a typical large size car* and an appropriate frontal Quarter-Car model.
Solve for the pressure of a gas using both equations at a temperature of 400K and a molar volume of 1x 10-4 m3/mol. For the van der Waals EOS, use parameters of a= 4.1x10-1 (m3/mol)2 Pa, and b=4.3x10-5 m3/mol.
ammonia enters a heat exchanger operating atsteady state as a superheated vapor at 14 bar 60degc where itis cooled and
Derive eulers equation 1- Derive. From first principles eulers equation from the rate of change of momentum 2- Show by integration how Eulers equation derives Bernoullis equation
a Steel ally to be used for a spring application must have a modulus of resilience of at least 2.07 MPa. What must be the metal's minimum yield strength.
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