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Re: Marilyn and units!



Am I missing something? Her figures seem to work out to about 3#/qt,
which is about 1.5 times the density of water. Sounds reasonable to me.

I have no problem with measuring the volume of a particular substance in
units of its weight.
Regards,
Jack


On Mon, 14 Jul 2003, Bob Sciamanda wrote:

Speaking of the confounding of units/dimensions, the following is a scan from
this Sunday's Marilyn Vos Savant column. Can anyone offer the Rosetta stone
which reduces each of her examples to a blood volume equal to one-eleventh of
body weight?

"We're taught that adults have a certain amount of blood. How much blood does a
child have? Or an Infant at birth?
-Kathy, Worcester, Mass.
Actually, the amount of blood depends on your size. In an average adult, the
volume of blood is about one-eleventh of the body weight. So a 150-pound adult
will have about 5 quarts of blood. A 75-pound child will have about 5 pints. and
a 7.5-pound baby will have about 8 fluid ounces. But people who live at high
altitudes, where the air contains less oxygen, must develop more blood: as much
as 4 more pints. This is why runners like to train in the mountains-they gain a
physical advantage over their sea-level counterparts."

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor


--
"Don't push the river, it flows by itself"
Frederick Perls