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post #9 of Old 04-20-2013
Capt Len
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Re: 100 lb of Lead Vs 100 lb of concrete

It's called specific gravity and all about weight for a given VOLUME , sort of a eureka moment. Since a cubic foot of ocean weighs 64 lbs (2 lbs of salt) a cubic foot of concrete weighs 64 lbs less in the water, If it's in the bilge it's all the same but your metacentric heights change but that's another story.
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