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A transistor in a stereoamplifier dissipates 0.4 W within a housing that is cylindrical radius 8 mm and height 8 mm. The top and sides are exposed to room air at 25oC with a convection coefficient of h = 80 W/m2K. Neglect the bottom and find the transistor surface temperature.
2. What is the design objective? -to minimize the required power input to the compressors 3. What parameters does the design engineer control?
steam enters a diffuser at 20 psia and 240of with a velocity of 900 fts and exits as saturatednbspvapor at 240of and
would a flagpole made of steel or aluminum freeze ones tongue to it faster? why? thermal conductivity 2. the outer
a rigid well-insulated tank with a volume of 3 fe contains air at p1 22 lbfin2 and t1 475 bullr. the air is stirred by
one kilogram of water contained in a piston-cylinder assembly initially at 160oc 150 kpa undergoes an isothermal
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 ..
air enters an adiabatic nozzle steadily at 300 kpa 200degcand 28 ms and leaves at 100 kpa and 168 ms. the inlet area of
Assuming saturated properties out of the evaporator and condenser
The weight W causes a tension of 100lb in cable CD. If d= 2ft, what is the momentum about the z axis due to the force exerted by the cable CD at point C?
every work producing system results in wasted energy. thermal efficiency gauge sthe conversion of heat to work in a
a cylindrical workpart 125 mm in diameter and 900 mm long is to be turned in an engine lathe. cutting conditions are v
Prove that the transformation Q1 = q12 Q2 = q2 sec p2 p cos p2 - 2q2 P= 1 P2 = sin p2 - 2q1 1 2q1 cos p2 is canonical, by any method you choose . Find a suitable generating function that will lead to this transformation.
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