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Physics
Physics
Problem
During a certain process, the internal energy of a closed gas system does not change (
Δ
U
=
0
\Delta U = 0
Δ
U
=
0
), yet measurements show that
Q
≠
0
Q \neq 0
Q
=
0
. What must be the sign of
W
W
W
? Explain your answer in one sentence.
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