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1. Solve Problem 8.109a using the effectiveness-NTU method.
2. Consider Problem 7.113. Estimate the heat transfer rate to the air, accounting for both the increase in the air temperature as it flows through the foam and the thermal resistance associated with conduction in the foam in the x-direction. Do you expect the actual heat transfer rate to the air to be equal to, less than, or greater than the value you have calculated?
steam at t1600 degrees c p115 mpa enters a reversible and adiabatic turbine at a flow rate of 300 kgs. the steam exits
a cylinder of metal that is originally 100mm tall and 50mm in diameter must be open die forged to a height if 50mm. the
if the solvent front moves 54 mm from the baseline and a compound in the food dye being analyzed moves 32 mm from the
you graduated from college after 4 long years and studying finally paid off you find a nice engineering job with a very
a nylon thread is subjected to a 10-n tension. knowing that e 3.2 gpa that the maximum allowable normal stress is 40
two lb of water vapor in a piston cylinder assembly is compressed at a constant pressure of of 250 lbfin2 from a volume
Consider air flowing in a small-diameter steel tube. Graph the Nusselt number associated with fully devel- oped laminar flow with constant surface heat flux for tube diameters ranging from 1 µ,m D 1 mm.
a 850-kg meteoroid happens to be composed of aluminum. when it is far from the earth its temperature is -13.5 degc and
calculate the enthalpy change of the universe during the process. Cp=Cv = 4.18 kj/kgK
calculate the speed of an iceberg driven by wind on its exposed not submerged surface. model the iceberg as a cylinder
Air at 127°C flows over the plate with a heat transfer convection coefficient of 15 W/m2 · K. Determine the emissivity, absorptivity, and radiosity of the plate. What is the net heat transfer rate per unit area?
Consider combustion of hydrogen in pure oxygen under constant pressure in a two-inlet and single-exit reactor. The reactants enter the reactor at temperature T1 = 200 K. The products leave the reactor at temperature T2 = 2000 K. No work is developed ..
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