Many units in the English system have practical (useful) units, that are mostly divisible by two. Important when you don't have a calculator.
Dan -----Original Message----- From: Marshall Dudley [mailto:mdud...@king-cart.com] Sent: Thursday, May 24, 2007 2:48 PM To: silver-list@eskimo.com Subject: Re: CS>Concentration?....ppm? Dan Nave wrote: > Which is colder, -40 degrees C, or -40 degrees F? > They are equal, that is the crossover temperature of the two scales. Now, which is heavier, an ounce of feathers or an ounce of gold. How about a pound of feathers and a pound of gold. No wonder I like the metric system better. Marshall > Water is a special case. > > Dan > > > -----Original Message----- > From: CWFugitt [mailto:c_wa...@earthlink.net] > Sent: Thursday, May 24, 2007 12:34 PM > To: silver-list@eskimo.com > Subject: Re: CS>Concentration?....ppm? > > Evening Marshall, > > >>At 10:07 AM 5/24/2007, you wrote: > > >> It is numerically correct. Actually it is mg/kg, but since a >> kilogram of water is a liter, then the equation holds. >> > > Thanks for explaining all this. > > >> Of course you can for water. The DEFINITION of a liter is 1000 grams >> of >> > > >> water. Thus from the definition there are 1,000,000 micrograms in a >> > liter. > > So, ....... a Liter is a unit of weight? I thought it was a unit of > volume? Both I guess. > > >> That is correct, ppm for something is weight/weight, IE for water it >> is1 mg/kg of water which equals 1 mg/liter of water. >> > > Ok........ maybe I should accept this. I am used to working with > weights that have a specific value, always, every day. > > I suppose this water standard means relatively pure water. > Low, very low, EC. I think some water, especially the mineral water > in TX, CA, and Nevada would mess up the weight of one liter by some > small percent. > > >> It is for the English system. But in the metric system when dealing >> with water, volume and weight are interchangeable at STP provided you >> know the equalities. >> > > I understand that water should have a standard. > I don't have any of the mineral water to weigh. > > Oh well....... I hope to explain a few things that may be of value to > the ones that don't normally work with small units in my next message. > > As always, ......... correct me when I am wrong. > > Thanks again, > > Wayne > > > -- > The Silver List is a moderated forum for discussing Colloidal Silver. > > Instructions for unsubscribing are posted at: http://silverlist.org > > To post, address your message to: silver-list@eskimo.com > > Address Off-Topic messages to: silver-off-topic-l...@eskimo.com > > The Silver List and Off Topic List archives are currently down... > > List maintainer: Mike Devour <mdev...@eskimo.com> > > > > >
