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April 19, 2014

Homework Help: physics

Posted by Jessi on Sunday, August 23, 2009 at 10:35am.

A cylinder that has a 40.0 cm radius and is 50.0 cm deep is filled with air at 20.0C and 1.00 atm. A 21.0 kg piston is now lowered into the cylinder, compressing the air trapped inside. Finally, a 79.0 kg man stands on the piston, further compressing the air, which remains at 20C.

(a) How far down ( h) does the piston move when the man steps onto it?
(b) To what temperature should the gas be heated to raise the piston and the man back to h(initial)?

I don't know where to start from here. Do you have to a change in volume type problem? Or could you do it using the ideal gas law?

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