Dear Gene, You are correct, I was thinking of the unit density at 1000 kg/ cubic metre at some temperature. I had recently come across the unit weight of water at 60 lb/cubic foot. My PhD wife who has a degree from UIUC and Purdue di not know the 60 number. So that intruige me.
I also use 9.81 it seems a good enough figure for engineering buildings. I apologize for the error. John Nichols >Date: Fri, 11 Oct 2002 17:29:17 -0500 (CDT) >From: Gene Mechtly <[EMAIL PROTECTED]> >X-X-Sender: <[EMAIL PROTECTED]> >To: John Nichols <nicholsj> >cc: "U.S. Metric Association" <[EMAIL PROTECTED]> >Subject: Newton's 2nd Law applied to Water > >On Fri, 11 Oct 2002, John Nichols wrote: > > ... > > Next time you are talking about imperial ask the imperial specialist what > > the unit weight is for water? > >What *location* do you have in mind for this specification of force of >gravity (weight) acting on one kilogram of water? Clearly, in SI, a unit >mass of water is one kilogram of water, and its weight is w = m g, where m >= 1 kg. But what is the value of g (in m/s^2) that you have in mind? > >Gene. John Nichols BE, Ph.D. (Newcastle), MIE (Aust) Assistant Professor Texas A&M University Department of Construction Science Langford AC Rm: A414 MD 3137 College Station, TX 77843-3137 Electronic mail: [EMAIL PROTECTED] Telephone: 979 845 6541 Facsimile: 979 862 1572 ----------------------------------------------------------------- Magna res est vocis et silentii temperamentum The greatest thing is to know when to speak and when to keep quiet Seneca the Younger (attributed) -----------------------------------------------------------------
