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Air at 40°C flows over a long, 25-mm-diameter cylinder with an embedded electrical heater. In a series of tests, measurements were made of the power per unit length, P', required to maintain the cylinder surface temperature at 300°C for different free stream velocities V of the air. The results are as follows:
(a) Determine the convection coefficient for each velocity, and display your results graphically.
(b) Assuming the dependence of the convection coefficient on the velocity to be of the form h = CVn, determine the parameters C and n from the results of part (a).
Do this by assuming uniaxial tension along [110] and expressing σ 1, σ 2,.. .,τ 12 in terms of σ [110]. Then use the matrix of elastic constants to ?nd e1, e2, . . .,γ 12, and ?nally resolve these strains onto the [110] axis to ?nd e[110].
The required effort is 75 N, applied at the end of an operating handle 600 mm long. For these operating conditions determine (a) the mechanical advantage, (b) the velocity ratio, (c) the efficiency of the machine.
determine the smallest value of µs for which equilibrium is maintained.
a cylindrical drill with radius r1 is used to bore vertically a hole through the centre of a sphere of radius r2.a find
a 115-v shunt motor develops 21 ib-ft when the armature current is 12 a. as the load on the motor is increased the
The 3-in.-diameter rod carries the 4000-lb · ft bending moment and a torque T. The yield stress of the material is 60 ksi. Determine the largest allowable value of T using the maximum distortion energy theory and a factor of safety of 2.
a pickup truck has a five liter four stroke cycle v6 si engine operating at 2400 rpm. the compression ratio rc10.21 the
It is not possible to subject the line to testing equipment, but the voltage and currents can be measured at the load and at the generator.
In which four areas must quality be considered? How do they interrelate?
Executive Overview - Provide an executive overview for Infrastructure proposal. How will your proposal help EduTech? What are the key aspects of your design? Why should EduTech select your proposal over your competitors' proposals? (Half page) Des..
a uniform beamoflength l flexural rigidity ei and cross-sectional plastic moment mp is built-in at both ends and
A well-insulated piston-cylinder device initially contains 5kg of saturated mixture of refrigerant-134a at -12°C, in which 2.55kg of the refrigerant is in the liquid phase. An electric switch is turned on, and a 110-V source supplies current to a res..
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