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A vertical cylinder fitted with a heavy leak-proof piston wi
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[QUOTE="CLARA, post: 6054068, member: 650639"] [h2]Homework Statement[/h2] HERE IS THE QUESTION A vertical cylinder fitted with a heavy leak-proof piston with diameter 84.0 mm contains air (under the piston) of density 1.59 kg/m3 in thermodynamic equilibrium with the surrounding atmosphere, which is at 100 kPa and 39 oC. Determine the mass of the piston in kg, to three significant figures. Use gravitational constant g = 9.81 m/s2.[/B] [h2]Homework Equations[/h2] i tried to use PV=mRT for the air in the cylinder[/B][h2]The Attempt at a Solution[/h2] mg= PA I know there is a force due the the piston and the force due to the air F[SUB]PISTON[/SUB] = F[SUB]AIR[/SUB] F[SUB]PISTON[/SUB] = mg F[SUB]AIR[/SUB] THIS IS WHERE IM STUCK IM NOT SURE IF MY WHOLE LOGIC FOR THIS QUESTION IS CORRECT. YOUR HELP IS GREATLY APPRECIATED[/B] [/QUOTE]
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A vertical cylinder fitted with a heavy leak-proof piston wi
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