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AP Physics 2
9.4 The First Law of Thermodynamics
BeginnerMCQConceptual25.2k
A horizontal cylinder with thick hatched walls representing thermal insulation. Inside, an ideal gas is trapped by a vertical frictionless movable piston on the right side. A horizontal arrow labeled 'Expansion' points to the right, showing the movement of the piston. No other labels, lines, text, or axes appear.
Insulated cylinder with a movable piston containing an ideal gas.
An ideal gas is enclosed in a cylinder with thermally insulated walls and a movable piston. The gas expands rapidly, pushing the piston outward in an adiabatic process. Which of the following correctly describes the change in temperature of the gas and provides a valid justification?

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