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(8) A ( 30 mathrm{~mm} ) diameter steel ( left(gamma=77.0 mathrm{kN} / mathrm{m}^{3} ight) ) ball covers a ( 15 mathrm{~mm} ) davreler hole in
(8) A \( 30 \mathrm{~mm} \) diameter steel \( \left(\gamma=77.0 \mathrm{kN} / \mathrm{m}^{3} ight) \) ball covers a \( 15 \mathrm{~mm} \) davreler hole in the bottom of a chember in which gas pressure is \( 27.000 \mathrm{kPo} \). What force is required of push the ball up into the chamber?
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