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A thin metal plate has one large insulated surface and another large surface exposed to solar radiation at a rate of 600 W/m2. The surrounding air temperature is 20 °C. Determine the equilibrium surface temperature of the plate if the convection heat transfer coefficient from the plate surface is 20 W/m2K and the emissivity of the top surface of the plate is 0.8.
a tank whose volume is 0.01 m3 initially evacuated. a pinhole develops in the wall and the air from the surroundings at
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
Identify the ions responsible for the peaks in the mass spectrum shown in Figure 20-20b.
an air conditioner can produce a 120 kjmin cooling effect while rejecting 2.5kw of heat. what is its cop and the
the african elephant has developed the pinna or external ear that functions as a radiator-convector. the pinna can be
An ideal Ericsson engine using helium as the working fluid operates between temperature limits of 550 and 3000 R and pressure limits of 25 and 200 psia. Assuming a mass flow rate of 14 lbm/s determine
A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..
a rigid container is filled with steam at 700 kpa and 200oc. at what temperature will the steam start to condense when
Also, derive an approximate expression for the strength-toweight ratio of the tube in terms of the working stress, its radius, and length L, and its specific weight ρg. This result is widely used in aircraft design.
a motorist decreases the speed of an automobile at a constant rate from 45 to 30 mih over a distance of 750 ft along a
solar turbines mercury 50 gas-turbine power generatorinlet air
an insulated piston-cylinder device initially contains 10kg saturated liquid water at 200kpa. now water steam at 0.5mpa
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