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That is entirely correct.A battleship may be 10 tons, but when you take it's total area, and divide it by it's total mass, then you get a density less than the coin, that, along with the curved sides, is what floats your boat.edit: originally put mass/mass=density as opposed to area/mass=density

Quote from: science_guy on 17/04/2007 15:46:22That is entirely correct.A battleship may be 10 tons, but when you take it's total area, and divide it by it's total mass, then you get a density less than the coin, that, along with the curved sides, is what floats your boat.edit: originally put mass/mass=density as opposed to area/mass=densityYou mean mass/area=density.

Quote from: Paul123 on 17/04/2007 18:20:21Quote from: science_guy on 17/04/2007 15:46:22That is entirely correct.A battleship may be 10 tons, but when you take it's total area, and divide it by it's total mass, then you get a density less than the coin, that, along with the curved sides, is what floats your boat.edit: originally put mass/mass=density as opposed to area/mass=densityYou mean mass/area=density.Would that not be : mass / volume ?Allthough area will play a role : e.g. you can make a Gilette-type razor blade float if you manage to put it flat on the surface of the water.