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Heat is conducted along a circuit board that has a copper layer on one side. The circuit board is 15 cm long and 15 cm wide, and the thicknesses of the copper and epoxy layers are 0.1 mm and 1.2 mm, respectively. Disregarding heat transfer from side surfaces, determine the percentages of heat conduction along the copper and epoxy layers. also determine the effective thermal conductivity of the board.
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consider a vertical plate of dimension 0.25 m x 0.50 m that is at ts100 c in a quiescent environment at t infinity 20
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a closed rigid tank whose volume is 1.5 m3 contains refrigerant 134a initially a two phase lipuid-vapor mixture at 10c.
Find the stress in both members shown below and what steel specifications (types of steel) are suitable for structural applications?
it is desired to double the efficiency of a carrot heat engine from 30 by raising its temperatureof heat addition while
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if you measured the time it takes for the construction elevator to go from a to b the b to c and then c to d and you
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