Aerospace Engineering > GATE 2009 > First Law of Thermodynamics
A piston compresses 1 kg of air inside a cylinder as shown
The rate at which the piston does work on the air is 3000 W. At the same time, heat is being lost through the walls of the cylinder at a rate of 847.5 W.
After 10 seconds, the change in specific internal energy of the air is
A
21,525 J/kg
B
-21,525 J/kg
C
30,000 J/kg
D
-8.475 J/kg

Correct : a

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