AP Physics 2 Quiz
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THERMODYNAMICS
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A fixed amount of gas in a piston-cylinder is the system. Use ΔU=Q−W\Delta U=Q-W, with Q>0Q>0 into the system and W>0W>0 done by the system. During a process, Q=+90 JQ=+90\ \text{J} and ΔU=−30 J\Delta U=-30\ \text{J}. Which statement correctly describes the work WW done by the gas?
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