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An ideal gas is held in a closed cylinder with a piston that can move vertically and has negligible friction.

If a student could measure pressure at three different places within the cylinder: in the center, at the bottom, and near the piston’s surface, which of the following would they find?

A

The pressure at the very center of the cylinder is the greatest.

B

The pressure at the very bottom of the cylinder is the greatest.

C

The pressure at the surface near the piston is the greatest.

D

The pressure is the same at all places within the cylinder.

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