Mass (kg)is an *extensive* variable. Comparison of two masses (extensive variables): A lake of water is more massive than a bag of blood.
Density (kg/m3)is an *intensive* variable. Comparison of two densities (intensive variables): Fresh water is more dense than salt water; but (extensive) a lake of salt water is more massive than a puddle of rain water. Do you see the difference, Jerry? ---- Original message ---- >Date: Sat, 14 Mar 2009 08:47:44 -0700 (PDT) >From: Jeremiah MacGregor <jeremiahmacgre...@rocketmail.com> >Subject: Re: [USMA:43816] Density >To: mech...@illinois.edu, "U.S. Metric Association" <usma@colostate.edu> > > They why not just say that blood is more massive > then water. > > Jerry > > ------------------------------------------------ > > From: "mech...@illinois.edu" <mech...@illinois.edu> > To: U.S. Metric Association <usma@colostate.edu> > Sent: Saturday, March 14, 2009 11:09:09 AM > Subject: [USMA:43816] Density > > Carleton, > > I'm pleased that you accept the word "mass" (or body > mass) when mass is intended and force is not > intended. > > Also "mass divided by volume" is called "density." > The term "heavier than" implies a comparison of > forces. > > e.g. Blood is more dense than water. And, a bag of > donated blood is heavier than the same bag filled > with water. > > Gene.
