Unformatted text preview: f = 0 . 90, we Fnd the apparent weight is zero (it ﬂoats). (e) Eq. 158 indicates that the water pressure at that depth is greater than standard air pressure (the assumed pressure at the surface) by ρ w gh = (1000)(9 . 8)(8) = 7 . 8 × 10 4 Pa. If we assume the pressure of air in the dinosaur’s lungs is approximately standard air pressure, then this value represents the pressure di±erence which the lung muscles would have to work against. (f) Assuming the maximum pressure di±erence 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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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
 Fall '08
 SPRUNGER
 Physics, Force, Work

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