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A wire is to be heated from 70°F to 200°F by blowing hot air past it as shown in Fig. 7.31. If the length of the heating section is 2 ft, determine the wire velocity required in order to accomplish the desired heating. Assume that the air temperature is constant at 400°F and the temperature of the wire is uniform at any cross section (NBi« 1). Neglect axial conduction, and take the air velocity to be 100 ft/sec. The properties of the wire are
Write a matlab code to calculate and plot the second explosion limit (2k1=k9[m] for the H2- air mixture with Phi=0.5 within temperature range of 500-1000k compare the line with the explosion limit in the textbook and see if they qualitatively agree. ..
Suppose that the mass of a system is 4 kg and the stiffness is 100 N/m. How much must the spring stiffness be changed in order to increase the natural frequency by 10%?
an equimolar mixture of n2 and o2 is heated to 2100 k at 1 atm which generates no. calculate the molar values of the
the data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1000 k and 300 k
a stationary gas turbine power plant operates on the brayton cycle and deliveres 20 mw to an electric generator. the
one pound mass of water in a piston-cylinder assembly initially a saturated liquid at 1 atm undergoes a
steam at 1 mpa 630.2oc expands in an insulated piston cylinder assembly to 0.01 mpa. determine the maximum work kj done
whole blood is placed in a concentric cylindern viscometer. the gap width is 1 mm and the inner cylinder radius is 30
what torque is needed at the end of the shaft to produce this if the diameter is equal to 300 mm. J=\pi\cdot\frac{D^4}{32}J=p·D432 \phi=\frac{TL}{JG}
a 0.75 inch diameter aluminum tension rod is 5 feet long and carries a load of 3000 ibf. find the tensile stress the
an sae 4140 oqt 1000 sleeve is to be secured to a solid pin of the same material with an actual diametral interference
A seven-member planar truss (with pin joints) is shown in Fig. 12.18. Each of the seven members has an area of cross section of and a Young s modulus of 207 GPa.
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