A large 50 cm diameter metal cylinder filled with air supports a 20.0 kg piston that can slide up and down without friction. The piston is 100 cm above the bottom of the cyliner when the temperature is 20℃. An 80.0 kg student then stands on the piston. After several minutes have elapsed, by how much has the piston been depressed? (Please think about the FBD for the piston and use Newton’s 2nd Law and the Ideal Gas Law to solve the problem.)
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