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An inventor claims to have made an engine that operates from a plutonium energy source at 1060°R and a heat sink at 558°R. He also claims that the engine produces 4.80 hp while rejecting 16000 Btu/hr of heat.
a) What is the claimed efficiency of the engine?
b) What is the claimed 2nd Law efficiency?
c) Is this engine possible?
CeO2 is an important energy material for application in fuel cells. What kind of bonding do you expect between Ce and O in this material? Why? Which broad class of material would this oxide belong to? The ionic radius of Ce4+ and O2- are 0.102 and 0...
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A constant-area duct is fed by a converging-only nozzle. The nozzle receives air from a large chamber at p1=600 KPa and T1=550 K. The duct has a friction length of 5.3, and it is choked at the exit. What is the pressure at the end of the duct? If 80 ..
A piston-cylinder assembly contains Ammonia initially at a pressure p = 500 kPa and specific volume v = 0.24533 m^3/kg (state 1). Expansion occurs to a state where the pressure is 150 kPa (state 2). During the process the pressure and specific volume..
On a hot summer day, a student turns his fan on when he leaves his dorm room in the morning. The dorm is well insulated but not air conditioned, and all of the doors and windows are closed. Draw a simple picture of this room after the student leaves ..
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