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Determine the temperature of the surface of the spacecraft when the radiation emitted equals the solar energy. Assume deep space temperature to be 2K.
Heat is added to the air until its temperature reaches 290 ºC. Calculate the heat added and the work the gas does on the piston.
A pipe is sealed at the top and is submerged in water. It is then drawn upward from the water. How tall could the column of water possibly be when T=25C (temperature of water)? How about when T=90?
Water vapor initially at 3.0 MPa and 300°C is contained within a piston-cylinder. Calculate the compressibility factor Z at state 1 and comment
This allows the free-stream velocity to remain constant. At what angle should the walls diverge to maintain a constant velocity between x = 1.5 m and x = 6 m?
Assume ideal gases with a constant heat capacity of cp = 29.3 J/mol K. Are the output pressures and temperatures are consistent with the second law?
If the flash drum is maintained at 0.6 MPa, what fraction of the feed exits as liquid? What are the compositions of the phases exiting the flash drum?
A very long cylinder (diameter 1mm) is placed perpendicular to a steady airstream whose velocity is 10 m/sec. The cylinder is heated electrically at 100 watts/meter span. At what distance downstream
An Irreversible first-order reaction gave 95% conversion in a batch reactor in 20 min. What would be the conversion of this reaction in a CSTR with a 20 min residence time?
Consider a spark ignition combustion engine with two possible configurartion for turbocharging. Configuration A is conventional turbocharging. Configuration B is a new propsed configuration using a
A reheat cycle operates with initial steam conditions of 1500 psia and 1000 degrees fahrenheit at the inlet to the turbine. The steam expands isentropically to 400 psia and is reheated at constant p
A communication satellite weighing 10,000 lb, including fuel, has been ejected from a space shuttle describing a low circular orbit around the earth.
An extruded beam has the cross section shown and a uniform wall thikness of 3mm. For a vertical shear of 1.2 kips, determine (a) the shearing stress at point A, (b) the maximum shearing stress int
A 10-ft steel beam is lowered by means of two cables A & B distant of 9-ft, unwinding at the same speed from overhead cranes. As the beam approaches the ground, the crane operators apply brakes
Lead shot is formed by dropping molten lead through the center of a high tower. The frictional resistance of the air as the lead falls down the tower helps to form the spherically shaped "shot" and
A composite wasll is to be constructed of 1/4 inch stainless steel (k=10.5 but/hr-ft-degrees F), 3.0 inches of corkboard (k=0.027 same units), and 1/2 inch of plastic (k=1.4); What is the individual
Why or Why not and provide cathode-anode half reactions? How fast is the corrosion occurring? Do we have enough information to answer this question? If not, what additional information is needed?
Why is it desirable and advisable for the Jominy specimens to be held in the oven at the austenitic temperature for a prolonged time prior to quenching? What do we call this type of activity?
A three-blade helicopter blade rotates at 200 rpm. If each blade is 12 ft long and 1.5 ft wide, estimate the torque needed to overcome the friction on the blades if they act as flat plates.
Successive maximum displacements of a spring-mass-dashpot system (shown by Fig. 19.10 of "Vector Mechanics for Engineers: Statics and Dynamics" 8th edition) are 1.25, 0.75, and 0.45in.
With the piston face resting against the stops, the water cools to 25°C. Sketch the two processes in series on a P-v diagram.
Determine the average normal stress at the section a-a and the average shear stress at section b-b in member AB. The cross section is square, 0.5 in. on each side.
A piston-cylinder contains 0.8 kg of nitrogen initially at 100 kpa and 27 degrees. The nitrogen is compressed slowly in a polytropic process during which pv^1.3 = constant until the volume is reduce
Molybdenum forms a substitutional solid solution with tungsten. Calculate the concentration (in weight percent) of molybdenum that must be added to tungsten to yield an alloy.
A feedwater heater uses extracted steam ( P1=500kPa,x1=100%) to preheat feedwater ( T2=50 celcius, P2=500kPa). Assuming no heat transfer to the surroundings, determine the temperature of exiting mi