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A spherical interplanetary probe of 0.5-m diameter contains electronics that dissipate 150 W. If the probe surface has an emissivity of 0.8 and the probe does not receive radiation from other surfaces, as, for example, from the sun, what is its surface temperature?
The panel shown forms the end of a trough that is filled with water to the line AA9. Referring to Sec. 9.2, determine the depth of the point of application of the resultant of the hydrostatic forces acting on the panel (the center of pressure).
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two carnot engines operate in series such that the heat rejected from one is the heat input to the other. the heat
consider a building whose annual air conditioning load is estimated to be 120000 kwh in an area where the unit cost of
A bellows may be modeled as a deforming wedgeshaped volume as in Fig. P3.31. The check valve on the left (pleated) end is closed during the stroke. If b is the bellows width into the paper, derive an expression for outlet mass flow as a function o..
If the model tests are to be performed in a wind tunnel using standard air, what is the required air velocity in the wind tunnel? Is this a realistic velocity?
a recently negotiated union contract allows workers in a shipping department 24 minutes for rest 10 minutes for
An ideal diesel cycle has a compression ratio of 16.8 and a cut off ratio of 1.63. Determine the maximum air temperature and the rate of heat addition to this cycle when it produces 197 hp of power, the cycle is repeated 1,250 times per minute, and t..
Apparent Density, Theoretical Density and Void Volume, A compacted body of iron powder is sintered into a 20mm-diameter, 45-mm-tall cylinder which, upon weighing
Air at 5 bar and 177°C (State 1) is expanded through a turbine to 1 bar and 27°C (State 2). The mass flow rate of air through the turbine is 2 kg/s. Stray heat loss of 53.22 kW occurs to a surrounding at 27°C. Calculate the power (kW) developed by th..
in a steam power plant 6000 kgs of steam enters the turbine at 8 mpa 480 degree c and expands to 0.7 mpa. if the
a girl riding a bicycle along a level road at 12 ms decides to speed up. she does 8 kj of work while moving 250 m along
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