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A cold canned drink is left in a warmer room where its temperature rises as a result of heat transfer. Is this a reversible process? Explain.
an ideal vapor compression refrigeration cycle that uses r-134a maintains a pressure in the condenser of 1000kpa and
a refrigerant 134a at 140 kpa and -10 degree celcius is compressed by an adiabatic 16kw compressor to an exit state of
for incompressible liquids flow work could usually be neglected in the steady-flow energy equation. in the trans-alaska
a 500 mw coal-fired power plant is burning coal with a heating value of 12000 btulb. the coal contains 2.0 sulfur. the
the lowest temperature that has been achieved is about 1 times 10-6 k. to achieve this an additional stage of cooling
Calculate the number of vacancies per cubic meter in some metal at 763°C. The energy for vacancy formation is 0.79 eV/atom, while the density and atomic weight for this metal are 4.77 g/cm3 and 88.45 g/mol, respectively.
a small high-speed turbine operating on compressed air produces a power output of 0.1 hp. the inlet state is 60 psi 102
the principal plane stresses and associated strains in a plane at a point are s1 36 ksi s2 16 ksi e1 1.0210-3 and e2
it takes 15 seconds to raise a 1200 kg car and the supporting 300 kg hydraulic lift platform to a height of 2.8 m. the
determine the design stress for bolts in a cylinder cover where the load is fluctuating due to gasnbsppressure. the
A Carnot heat engine operates between 40C and 320 C. What is the thermal efficiency? if the work output is 200 kJ/kg, what is the quality of state A (in 320C)?
bone cement used by orthopedic surgeons to set artificial hip implants in place is methyl methacrylate polymerized
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