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A long container has air enclosed inside...

A long container has air enclosed inside at room temperature and atmoshperic pressure `(10^(5) Pa)`. It has a volume of 20000 c c. The area of cross section is `100 cm^(2)` and force constant of spring is `k_("spring") = 1000 N//m`. We push the right piston isothermally and slowly till it reaches the origianl position of the left piston which is movalbe. Final length of air colume is found to be 25 h cm. Assume that spring is initially relaxed. Find `h`.

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