Why is the square of the universal speed limit the amount of energy?
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From: Tom Roberts on 3 May 2010 10:42 calvin wrote: > On May 2, 11:40 am, Tom Roberts <tjroberts...(a)sbcglobal.net> wrote: >> ... Historically we use seconds and meters, which happen to >> make c be a very large number with units meters/second; ... > > It's centimeters per second. Actually, furlongs per fortnight is the usual example for other units. Tom Roberts
From: calvin on 3 May 2010 10:50 On May 3, 10:42 am, Tom Roberts <tjrob...(a)sbcglobal.net> wrote: > calvin wrote: > > On May 2, 11:40 am, Tom Roberts <tjroberts...(a)sbcglobal.net> wrote: > >> ... Historically we use seconds and meters, which happen to > >> make c be a very large number with units meters/second; ... > > > It's centimeters per second. > > Actually, furlongs per fortnight is the usual example for other units. Energy in ergs equals mass in grams times the square of the speed of light in centimeters per second. Units matter. If you want to rewrite the equation with the speed of light in furlongs per fortnight, that's fine, but you will need to adjust the units of the other terms accordingly.
From: J. Clarke on 3 May 2010 12:16 On 5/3/2010 10:50 AM, calvin wrote: > On May 3, 10:42 am, Tom Roberts<tjrob...(a)sbcglobal.net> wrote: >> calvin wrote: >>> On May 2, 11:40 am, Tom Roberts<tjroberts...(a)sbcglobal.net> wrote: >>>> ... Historically we use seconds and meters, which happen to >>>> make c be a very large number with units meters/second; ... >> >>> It's centimeters per second. >> >> Actually, furlongs per fortnight is the usual example for other units. > > Energy in ergs equals mass in grams times the square > of the speed of light in centimeters per second. Units > matter. If you want to rewrite the equation with the > speed of light in furlongs per fortnight, that's fine, but > you will need to adjust the units of the other terms > accordingly. This is called a "unit conversion". If you have visions of becoming a scientist or engineer then you should learn how to do them. What _is_ the name of the unit of energy in the furlong-firkin-fortnight system anyway?
From: spudnik on 3 May 2010 13:12 "dimensionless constants" are well & good, so long as you *know* what units are actually involved with "c"' (as i recall, this is Einstien's abbreviation "celeras," or some thing, which means "speed" in Latin), but I'd hardly say that "c" is "dimensionless," even if it is "one lightyear per year.... and "A" stood for "arbeit" or work, as in "A=mcc;" he was not enough of a schmuck to put his own initial into it, I guess. > --- news://freenews.netfront.net/ - complaints: n...(a)netfront.net --- --Light: A History! http://wlym.com
From: BURT on 4 May 2010 15:52
On May 3, 10:12 am, spudnik <Space...(a)hotmail.com> wrote: > "dimensionless constants" are well & good, so long > as you *know* what units are actually involved with "c"' > (as i recall, this is Einstien's abbreviation "celeras," or > some thing, which means "speed" in Latin), but > I'd hardly say that "c" is "dimensionless," even if > it is "one lightyear per year.... and "A" stood > for "arbeit" or work, as in "A=mcc;" he was not enough > of a schmuck to put his own initial into it, I guess. > > > --- news://freenews.netfront.net/ - complaints: n...(a)netfront.net --- > > --Light: A History!http://wlym.com The square of the universal speed limit is used to define the fundamental amount of energy in mass. But why should that be the case? Mitch Raemsch |