A) 8900 J
B) 6400 J
C) 5400 J
D) 7900 J
Correct Answer: D
Solution :
[d] \[\Delta Q=\Delta U+\Delta W\Rightarrow 2\times {{10}^{3}}\times 4.2=\Delta U+500\] \[\Rightarrow \Delta U=7900J\]
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