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Solar energy reaching the earth is about 1350 W/m2 outside the earth’s atmosphere and 950 W/m2 on earth’s surface normal to the sun on a clear day. Someone is marketing 2 m 3 3 m photovoltaic cell panels with the claim that a single panel can meet the electricity needs of a house. How do you evaluate this claim? Photovoltaic cells have a conversion efficiency of about 15 percent.
Considering the flow of a uniform stream of speed V in the x-direction, a source of strength Q at (-1,0) and sink of strength Q at (1,0). Find the velocity potential and the stagnation points
118 an insulated rigid tank whose volume is 0.5 m3 is connected by a valve to a large vessel holding steam at 40 bar
in a jet engine a flow of air at 1000 k 200 kpa and 40 ms enters a nozzle where the air exits at 500 ms 90 kpa. what is
a cold air-standard otto cycle operates between temperature limits of 70 and 1500 f. calculate the thermal efficiency
what two outcomes characterize the response of an opaque surface to incident radiation? which outcome affects the
a 700 kg automobile is traveling at 30 msec when it suddenly applies its breaks and lock the wheels. when this happens
consider a pistoncylinder arrangement that has a linear spring mounted such that as the piston rises to a certain point
air enters a compressor at 105 kpa and 300 k with a volumetric flow rate of 12 m3min and exits at 1200 kpa and 400 k.
air enters the compressor of a regenerative air-standard brayton cycle with a volumetric flow rate of 60 m3s at 0.8 bar
SO3 has many uses including the production of sulfuric acid (H2SO4). A gas stream having the (molar) composition shown in the figure below is to be passed through a two-stage converter. The fractional conversion of SO2 to SO3 (per single pass) in the..
If the bar is subjected to centric forces of magnitude P = 30 kN and knowing that EA = 70 GPa and EB = 105 GPa, determine the normal stress (a) in the aluminum layers, (b) in the brass layer.
A pump is employed to deliver liquid water from a pond to a higher elevation. The pump steadily draws water from the pond at a volumetric flow rate of 192 gal/min through a pipe having a 7 in diameter inlet. The exit diameter of the pipe is 2 in. and..
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