From b234b981acb135ed00a7ecf444dde6fe33d9f0f3 Mon Sep 17 00:00:00 2001
From: bnewbold
Date: Sun, 24 Jan 2010 10:12:18 +0000
Subject: fixes

physics/units.page  13 +++
1 file changed, 3 insertions(+), 10 deletions()
(limited to 'physics/units.page')
diff git a/physics/units.page b/physics/units.page
index bfc78bc..f6b0d68 100644
 a/physics/units.page
+++ b/physics/units.page
@@ 1,10 +1,3 @@

format: rst
categories: physics
toc: no
...

======================
Units
======================
@@ 30,7 +23,7 @@ of light (c) and Plank's constant ($\hbar$); the gravitational constant
(G) is a possibility for the third constant/unit, but energy (in
electronvolts: eV) is often used instead because it gives more useful
relations and because there is no accepted theory of quantum gravity to unite
these three constants. See _`Plank Units` for more on using G as a unit.
+these three constants. See Plank Units for more on using G as a unit.
Working with natural units simplifies physical relations and equations because
many conversion factors drop out.
@@ 39,7 +32,7 @@ Given the relations between cgs units (gm, cm, sec) and natural units (c,
$\hbar$ , eV), we can find the natural units of an arbitrary quantity
$[Q]=[gm]^{a}[cm]^{b}[sec]^{c}=[c]^{\alpha}[\hbar]^{\beta}[eV]^{\gamma}$:
$$(\alpha,\beta,\gamma)=\left(\begin{array}{ccc} 2 & 1 & 0\\ 0 & 1 & 1\\ 1 & 1 & 1\end{array}\right)\left(\begin{array}{c} a\\ b\\ c\end{array}\right)=(2a+b,b+c,abc)$$
+$$(\alpha,\beta,\gamma)=\left(\begin{array}{ccc} 2 & 1 & 0\\ 0 & 1 & 1\\ 1 & 1 & 1\end{array}\right) \left(\begin{array}{c} a\\ b\\ c\end{array}\right)=(2a+b,b+c,abc)$$
or in reverse:
@@ 47,7 +40,7 @@ $$(a,b,c)=\left(\begin{array}{ccc} 0 & 1 & 1\\ 1 & 2 & 2\\ 1 & 1 & 2\end{arra
Plank Units

Plank units (defined by Plank soon after defining his constant $\hbar$) are a version of _`Natural Units` using the gravitational constant G as the the
+Plank units (defined by Plank soon after defining his constant $\hbar$) are a version of Natural Units using the gravitational constant G as the the
third unit (instead of the common measure of energy). When converted back into
masslengthtime units we get three quantities which define the "Plank Scale",
which may provide estimation of the domain where quantum gravity effects become

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