Engineering, 25.11.2019 22:31 zionnahl
Consider a cylindrical nuclear fuel rod of length / and diameter ' that is encased in a concentric tube. pressurized water flows through the annular region between the rod and the tube at a rate , and the outer surface of the tube is well insulated. heat generation occurs within the fuel rod, and the volumetric generation rate is known to vary sinusoidally with distance along the rod. that is, sin([//), where (w/m3 ) is a constant. a uniform convection coefficient k may be assume a) obtain expressions for the local heat flux q'(x) and the total heat transfer q from the fuel rod to the water. (b) obtain an expression for the variation of the mean temperature tm(x) of the water with distance along the tube (c) obtain an expression for the variation of the rod surface temperature ts(x)with distance along the tube. develop an expression for the x-location at which this temperature is maximized.
Answers: 1
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
Answers: 2
Engineering, 04.07.2019 18:20
For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.
Answers: 1
Engineering, 04.07.2019 19:10
Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?
Answers: 3
Consider a cylindrical nuclear fuel rod of length / and diameter ' that is encased in a concentric t...
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