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Unformatted text preview: f = 0 . 90, we Fnd the apparent weight is zero (it oats). (e) Eq. 158 indicates that the water pressure at that depth is greater than standard air pressure (the assumed pressure at the surface) by w gh = (1000)(9 . 8)(8) = 7 . 8 10 4 Pa. If we assume the pressure of air in the dinosaurs lungs is approximately standard air pressure, then this value represents the pressure dierence which the lung muscles would have to work against. (f) Assuming the maximum pressure dierence the muscles can work with is 8 kPa, then our previous result (78 kPa) spells doom to the wading Diplodocus hypothesis....
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 Fall '08
 SPRUNGER
 Physics, Force, Work

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