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A 0.2-cm-thick, 10-cm-high, and 15-cm-long circuit board houses electronic components on one side that dissipate a total of 15 W of heat uniformly. The board is impregnated with conducting metal fillings and has an effective thermal conductivity of 12 W/m*K. All the heat generated in the components is conducted across the circuit board and is dissipated from the back side of the board to a medium at 37 deg. C, with a heat transfer coefficient of 45 W/m^2*K. (a) Determine the surface temperatures on the two sides of the circuit board.
the piston of a piston-cylinder device containing gas has a mass of 60kg and a cross-section area of 0.04m. the local atmospheric pressure is 0.97bar, and the gravitational acceleration is 9.81ms. determine the pressure inside the cylinder?
two kilograms of air within a piston-cylinder assembly executes a carnot power cycle with maximum and minimum
Sketch the T-s diagram for the cycle (put labels and appropriate information)
Calculating a Constant Pressure Process, In a constant pressure, nonflow process, 6Btus of heat are added to a gas while the volumes change from 1.6ft^3 to 2.0ft^3
Determining the largest couple that can be applied to a beam in pure bending. A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa.
A new cast iron pipe is 5 km long and 15 mm diameter is used to convey water at a rate of 0.0150m3s-1. Given the absolute roughness of the pipe is 0.26 mm, density of water is 998 kg/m3 and dynamic viscosity of water is 1.14 × 10-3 kgm 1s-1.
In the gear-and-shaft system shown, the shaft diameters are dab= 2 in. and dcd=1.5 in. Knowing that G = 11.2 x10^6 psi, determine the angle through which end d of shaft cd rotates.
Determine the required length L of each splice if a factor of safety is 2.75.
communication satellites are placed in a geosynchronous orbitthat is in a circular orbit such that they complete one
Determine the peak runoff from 500 ft of pavement(32ft wide) that drains toward a gutter(for 10 years freq. storm), the pavement slope is .0005, n=.016 and c=.9
Determine the radius of the crank R and the speed n of a slider crank mechanism, used in a shaker table. It is required that the average speed of the table is 5 m/s, and the maximum absolute acceleration is 3000m/s^2. Assume ratio R/L=0.2
A body with a plane stress field has material properties E, ν and has the following displacement field
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