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The outer surface of a spacecraft has an emissivity of 0.8 and an absorptivity of 0.3 for solar radiation. If solar radiation is incident on the spacecraft at a rate of 1000 W/m2, determine the temperature of the surface of the spacecraft when the radiation emitted equals the solar energy. Assume deep space temperature to be 2K.
determine the force and moment reactions at the support A of the built in beam which is subjected to the sine-wave load distribution.
compute the torsional shear stress in a hallow shaft with an outside diameter of 40 mm and an inside diameter of 30 mm
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
a cylindrical pressure tank 15 feet long and 40 inches in mean diamater is to be fabricated from .5 inch steel. a 15
If the efficiency of the turbine in converting the mechanical energy given up by the fluid to the turbine shaft is 89% (nt = 0.89), calculate the friction loss in the turbine in J/kg.
an elevated open stairway is designed to be supported by four steel rods connecting the stairway to the ceiling. the
the maximum power output capability of an engine decreases with altitude because the air density and hence the mass
an insulated piston-cylinder device contains 100 l of air at 400 kpa and 25degc. a paddle wheel within the cylinder is
one of the walls of a dam is at 67 degrees to the horizontal. the wall is 8 m long and 40 m wide. density of the water
a tennis ball is struck from a height of 7.5 ft. it strikes the smooth ground at a distance of 20 ft away and bounces
three cstr are to be used in series. the second reactor has a volume twice that of the first and the third reactors.
refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at
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