10-08-2007, 08:29 AM
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#11
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“Hypocrisy: prejudice with a halo”
Join Date: Mar 2007
Location: Savannah, Georgia
Posts: 21,393
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Quote:
Originally Posted by ZenGum
Agreed. 40 pounds ... 18kg ... surely not. mediocre "big head" comments aside.
Given that the human body has slightly less density than water, this gives us various ways to approximate the weight of various parts based on their volume.
Easiest is to find a container of water that is about the same size as the body part, in this case, LJ's head. I'm thinking of 4 liter (roughly, gallon) containers as being pretty close to a human head. So we are looking at 4 or 5 kilograms, 10 to 12 pounds.
Also consider that typical human brain capacity is about 1300 to 1400 ccs, 1.3 to 1.4 liters. Roughly triple that (since lots of the head isn't brain) and again we are approaching 4 liters, 4 kilograms, 10 pounds.
If we want to go to greater lengths we could do an Archimedes type measurement. LJ gets into a large bath with just his head above the water, marks water level, submerges head, marks water level, calculates volume displaced, multiply by density of body... but then we have to allow for the hollow places in the head: mouth, sinus, ears etc.
I guess the scales thing would be easier. Please do it LJ, now I am itching to know.
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It might be easier to just lay on a table with the head hanging off the side and the neck in a completely relaxed mode and limp. Place an electronic scale under the head and lift it till it is in a completely neutral position in line with the neck. That should give you a fairly close estimate.
Or you could look here:
http://danny.oz.au/anthropology/note...ad-weight.html
And then we have the complete in depth discussion by people who have already started thinking about the issue:
http://ask.metafilter.com/36836/Head-Weight
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