Re: SI and nothing else

["James W. Wheeler" <jwheeler@eagle.lhup.edu>]

hbar=c=G=1
hbar*c =197.3 MeV*fm=1  gives an equivalence between energy and distance
c=3x10^8 m/s = 1        gives an equivalence between time and distance
G=6.67e-11 m^3/(kg*s^2)=1 gives an equivalence between mass and distance
e.g
	1 m = (1/3x10^8) s
	1 m = 10^15/(197.3 MeV)=10^28/(1.6*197.3 J)
	1 m = (9/6.67)x10^27 kg
	
(if I've done the math right!)
The best source I know of for this stuff is the book by Misner, Thorne, 
and Wheeler "Gravitation".

On Thu, 16 Oct 1997, LUDWIK KOWALSKI wrote:

> David: can you briefly explain a system of units in which the number of
> fundamental units is zero (plank's system, as you wrote).