Speaking of squirming, you can squirm and wiggle all you want but you were still wrong in post 763, 765, as in this one, that immersion does not measure weight.
Metmom. I have to disagree because of the specificity of "immersion" meaning completely submerged. Weight can only be determined IF the body is floating in the medium... immersion can only measure volume accurately.
Take for example a 1 Meter cube of lead and a 1 Meter cube of styrofoam. Both occupy the same volume... but the cube of lead is really easy to immerse in water while you have to work really hard to immerse the cube of styrofoam.
A cubic centimeter of water is very close to 1 g/cc in weight, so a cubic meter of water would weigh 1000 Kilograms or about 2200 pounds. A cubic centimeter of lead weighs ~11.3 grams so the cubic meter of lead would weigh 11,300 Kilograms, or almost 25,000 pounds ... yet it would displace only 1000 Kilograms (2200 lbs) of water. A cubic meter of average density Styrofoam would weigh about 100 Kilograms (220 lbs) (Styrofoam is sold in densities from 25 to 200 Kilogram per cubic meter). That cube of styrofoam, when floated in water, would only displace 100 Kilograms of water... you would have to apply at least 900 Kilograms of force to submerge it.
Displacement of an object that will float measures weight. The displacement of a submerged object can only provide information about volume.