The factory pipe has a height h = 22.4 m. The inlet of the pipe is tightly closed with valve A (Fig. 71), having a cross-section S = 1 m2. The outside air temperature is tо = 0° C, the pressure is Po = 760 mm Hg. Art. Determine the average air temperature in the pipe if it is known that due to the temperature difference, a force F = 8.7 kg acts on the damper. Take the molecular weight of air to be 29.

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