Good point... why ISNT the stokes equation written -del(P) + u(del^2*v) = rho(vdot - b) It seems way more efficient to just factor the rhos into one term than to distribute it around both the body and the acceleration terms... (just kidding guys... no need for another 100 posts!) ----- Original Message ----- From: "Edward Gisske" To: Sent: Friday, April 16, 2004 10:17 AM Subject: Re: Why isn't Ohm's Law written I=V/R? > Wow, > If we can generate this much discussion with simple algebra, think what we > could do with partial differential equations, knot theory, Hilbert space or > the Navier-Stokes equations... > Ed > ----- Original Message ----- > From: "Mike Hawkshaw" > To: > Sent: Friday, April 16, 2004 10:05 AM > Subject: Re: Why isn't Ohm's Law written I=V/R? > > > > Because Ohm was a physicist, not an electronics engineer. > > > > Ohm's Law states: > > "The potential difference (voltage) across an ideal conductor is > > proportional to the current through it. > > The constant of proportionality is called the "resistance", R. " > > > > This is what he would have said - or something very similar (or not at all > > similar if he said it in German :-) > > He might equally have said: > > "The current through an ideal conductor is directly proportional to the > > potential difference accross it." > > > > The first came from the net and the second from an old "O Level" physics > > book. > > > > The equations which we have later adopted to make convienient use of his > law > > are all equally valid representations of the same thing. It is usually > > written as V=IR (or E=IR) because (I believe) before computers, the other > > two ways of writing it down would have taken up two lines. Only since > > computers have we had the / symbol. > > > > Hope this helps.....Mike. > > > > ----- Original Message ----- > > From: "Rick Regan" > > To: > > Sent: Thursday, April 15, 2004 3:13 PM > > Subject: [EE]: Why isn't Ohm's Law written I=V/R? > > > > > > > Does anyone know why Ohm's law is writtem V=IR (E=IR) > > > instead of I=V/R? Of course I know they're equivalent. > > > I just wondered why - if I is the dependent variable and V > > > and R are the independent variables - it's basic form > > > isn't I=V/R. > > > > > > -- > > > http://www.piclist.com hint: To leave the PICList > > > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > > > > --- > > Outgoing mail is certified as Virus Free. > > Checked by AVG anti-virus system (http://www.grisoft.com). > > Version: 6.0.657 / Virus Database: 422 - Release Date: 13/04/2004 > > > > -- > > http://www.piclist.com hint: PICList Posts must start with ONE topic: > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads