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A laterally insulated fin 2.5 m long is initially at 60?C. The temperature of one end is suddenly increased to and maintained at 600?C while the temperature of the other end is maintained at 60?C. The diffusivity is a = 10-5m2/s. Use five x steps, time increments of 5 ks, and calculate the time necessary for the center of the rod to reach a temperature of
1. 90?C
4. 110?C
5. 120?C
6. 140?C
7. 160?C
an adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the refrigerant from the
Air undergoes a polytropic process in a piston cylinder from p1=1bar, T1=295K to p2=7bar. The air is modeled as an ideal gas and kinetic and potential energy effects are negligible. For a polytropic exponent of 1.6, determine the work and heat transf..
a steam turbine power plant is based on the ideal rankine cycle the working fluid is water. the heat transfer from the
during the course of a motor test the motor rpm is measured and recorded at regular intervals as990 1030 950 1050 1000
a closed rigid tank whose volume is 1.5 m3 contains refrigerant 134a initially a two phase lipuid-vapor mixture at 10c.
a submarine is cruising in the ocean at a depth of 320 m. salt water has a specific gravity of 1.03. determine the
Nitrogen in a piston-cylinder assembly undergoes a polytropic expansion process. Initially, nitrogen is at 125 C and 144 kPa. Then it is expanded to a state of 102 kPa and 90 C. determine the heat transfer and work for the process considering no chan..
The exchanger is to be constructed from thin-walled copper tubes 2.5 cm in outside diameter. The oil acts as the shell-side fluid and the heat transfer coefficient associated with this flow is 600 Wm-2K-1. The thermal properties of the oil and wat..
in this piston-cylinder device d1 20 cm-diameter d2 10 cm-diameter and the initial volume of chamber 2 is 0.1 m3.
boat a and boat b leave from point o the origin at the same time. boat a is traveling at 20 fts 30 degrees west of
A magnetic field is represented by a group of exes on the page, with an arrow to the right representing the velocity of a proton. How would the force exerted by the magnetic field be shows?
Explain the effect of the following on the rate of diffusion and provide a brief explanation why each of these factors affect the rate of diffusion.
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