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The temperature of a flowing gas is to be measured with a thermocouple junction and wire stretched between two legs of a sting, a wind tunnel test fixture. The junction is formed by butt-welding two wires of different material, as shown in the schematic. For wires of diameter D=125 m and a convection coefficient of h=700 W/m^2 K, determine the minimum separation distance between the two legs of the sting, L=L1+L2, to ensure that the sting temperature does not influence the junction temperature and, in turn, invalidate the gas temperature measurement. Consider two different types of thermocouple junctions consisting of (i) copper and constantan wires and (ii) chromel and aluminel wires. Evaluate the thermal conductivity of copper and constantan at T300 K. Use kCh=19 W/mK and kA=l29 W/mK for the thermal conductivities of the chromel and alumel wires, respectively.
air flows steadily through a constant-area duct. at section 1 the air is at 400 kpa abs 325k and 150 ms. as a result of
an electric motor of total weight 3330 pounds is mounted on a simply supported beam with an overhang as shown
a 250 mm bar of 15mm x 30 mm rectangular cross-section consists of two aluminum layers which are 5 mm thick each brazed
a tensile member of 2024-0 aluminum alloy used for aircraft fuselage had an original cross-sectional area of 4.0square
A plane can fly 299 mph in still air. If it can fly 180 miles downwind in the same amount of time it can fly 119 miles upwind, find the velocity of the wind.
a cylinder with a 6.0 in diameter and 12.0 in length is put under compression load of 150 kips. the modulus of
the basis of a design project which will be completed. you should therefore think carefully about which of the
Advanced Stress Analysis Assignment
What is a 90 percent confidence interval for the standard deviation of the thickness of a washer produced by this procedure?
a motorist enters a freeway at 36 kph and accelerates uniformly to 90 kph. from the odometer in the car the motorist
What is the couple moment of the two couples that act on the pipe assembly. The distance from A to B is d = 400 mm.express the result as a cartesian vector.
Calculate the force required in direct extrusion of 1100-O aluminum from a diameter of 6 in. to 2 in. Assume that the redundant work is 30% of the ideal work of deformation, and the friction work is 25% of the total work of deformation.
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