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One kilogram of Refrigerant 134a contained within a piston-cylinder assembly undergoes a process from a state where the pressure is 7 bar and the quality is 50% to a state where the temperature is 16°C and the refrigerant is saturated liquid. Determine the change in specific entropy of the refrigerant, in kJ/kg K. Can this process be accomplished adiabatically?
Consider a two- dimensional, straight triangular fin of Length L= 50mm and base thickness t= 20mm. The thermal conductivity of the fin is k= 25 W/mK. The base temperature is T_b= 50 degrees Celsius, and the fin is exposed to convection conditions cha..
a solid object of aisi 302 steel at a temperature of 850?c is quenched in mineral oil at a temperature of 25?c. the oil
Solar energy reaching the earth is about 1350 W/m2 outside the earth’s atmosphere and 950 W/m2 on earth’s surface normal to the sun on a clear day. Someone is marketing 2 m 3 3 m photovoltaic cell panels with the claim that a single panel can meet th..
in 2001 the united states produced 51 of its electricity in the amount of 1.878 1012 kwh from coal fired power plants.
a building has a 10000 ft.sq interior office space served by one ahu with economizer function. the supply air flow is
Using the Internet, identify at least five medical applications of MEMS technology. In each case, explain the scientific and technological basis for the application, discuss the state of current research, and determine how close the technology is ..
Two infinite parallel plates are separated by a distance h. The space between them is filled with a Newtonian fluid: density (rho), viscosity (mu). The lower plate is fixed
At a certain position in a piping system, a fluid with a specific gravity of 1.50 passes through an 8-cm diameter pipe with a velocity of 1.2 m/s. At some point downstream the elevation of the pipe has increased by 15 m and the pipe size has been red..
Ammonia as a saturated vapor at 130 psi expands is thermally in an internally reversible process to a pressure of 18 psi. Determine the heat transfer and work for this process.
an ocean thermal energy conversion otec system is proposed to generate 10 mw of electricity. the proposed location of
a 9mm bullet with mass .28 oz.0175lbm exits a pistol at 1250 fts. find the kinetic energy in btu. if this bullet was
a jet of water having a velocity of 40 ms impinges on series of vanes moving with a velocity of 20 ms. the jet makes an
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