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A very long cylinder (diameter 1mm) is placed perpendicular to a steady airstream whose velocity is 10 m/sec. The cylinder is heated electrically at 100 watts/meter span. At what distance downstream is the rms temperature fluctuation in the wake of the cylinder reduced to 1?C? Assume that the distribution of the mean temperature difference in the wake is similar to the distribution of the mean velocity defect. For air at room temperature and pressure, ? = 1.25kg/m3, cp = 103joule/kg?C. Hint: the dimension of the heating is joules/sec/meter. The dimension of the heat flux through position x is (?cp)T times the velocity times the integrated profile in y, which will have a dimension of length. The dimensions of the heating and the dimensions of this heat flux are the same.
the ball at is kicked such that 60 . if it strikes the ground at having coordinates 25 -25 determine the speed at
comment on any safety hazards that might be encountered. especially, what would you anticipate if the inlet gas control valve were to malfunction and the gas space above the fuel were to reach full storage tank pressure (69bar)? the fuel tank has ..
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for a 3 sigma control chart what is the probability of four successive points plotting outside 2 sigma limits? if such
A steel cylinder with an internal radius of 50mm is designed to carry a maximum stress of 400 MPs. It is subjected to an internal pressure of 80 MPs.(i) Determine the required wall thickness.
A household refrigerator with a coefficient of performance of 2.4 removes energy from the refrigerated space at a rate of 600 Btu/h. Evaluating electricity at , determine the cost of electricity n a month when the refrigerator operates for 360 hou..
the work on a system with a mass of 100 lbm is known to be 10 btus. if there is no change in potential energy and the
Friction between the piston and cylinder wall can be neglected because the process occurs so slowly. For the air, determine the initial and final pressures in kPa and the boundary work for the process in kJ.
consider a cylinder containing 4 moles of compressed argon to 10 bar and 298 k. the cylinder is housed in a big lab
determine the repeat distance linear density and packing fraction for bcc lithium which has a lattice parameter of
the ends of a wire 1.17 m in length are suspended securely between two insulating plates. the diameter of the wire is
what is comb drive actuator simulation steps in ansys software?
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