Posted by GT on July 14, 2002 at 22:10:00:
In Reply to: adjusting ocean weighting to freshwater weighting? posted by TDI_2 on July 11, 2002 at 11:32:26:
I belive you're right, what a flame-fest over basic physics.
what you're saying is that the diver & gear weigh
331 lb.s and are neutrally bouyant in water, so the diver displaces 331 lbs / 64 lbs/cu ft. = 5.17 cu ft. of fluid. if the same diver and gear jumped into fresh water the same 5.17 cu ft. would be displaced, but it would only weigh 5.17 * 62.4 lbs/cu ft. = 323 lbs. since the diver & gear weigh 331, he's 8 lb.s underweighted. -- figures above rounded, and displacement of the 8 pound weight is neglected.-- If you had a group of divers, instead of doing the multiply and divide for each diver, you could perform the calculations as you presented them, reusing your 1.025 constant.
i