One end of the cylindrical tube length of 30 cm and the

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One end of the cylindrical tube length of 30 cm and a radius R = 1 cm is filled with air and closed by a stopper. At the other end of the tube is slowly slid plunger. When moving the piston 10 cm tube flies. Find the friction force F plug on the wall of the tube at the time of departure. Atmospheric pressure is normal.

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Task 50267. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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