Re: Cause this isn't Star Wars...

David Friedman wrote:

Means the same thing. The ship is floating (well, at least we hope so)
therefore the mass of the water displaced is equal to the total mass of
the ship.


Indeed it is.

But it isn't equal to the total volume of the ship, which was the claim that the previous poster made--some of that volume is above the waterline, and so doesn't correspond to displacement.


Actually, it pretty much DOES, if you read his whole description:

One cubic metre = 1 tonne displacement.

This is true for WATER. A cubic metre of STEEL is one hell of a lot more (I don't remember the density of steel offhand, but I'm betting it's somewhere around 5-10x water).

The formula gives you the mass of water displaced by the ship (more or less; depends on whether it's salt water or not).




--
Sea Wasp
/^\
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Live Journal: http://seawasp.livejournal.com

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