--- loncom/html/adm/help/tex/Physical_Units.tex 2006/09/07 21:25:51 1.3
+++ loncom/html/adm/help/tex/Physical_Units.tex 2011/12/02 17:42:01 1.8
@@ -3,8 +3,8 @@
The following subsections show the physical units that LON-CAPA accepts.
The symbols must be used when entering the units, for example {}``35 kg''.
-Note that compound units are formed by using *, / and ^. For example, an acceleration might
-be in terms of ``m/s^2'' or meters per second squared. This could also be expressed as``m/s/s''.
+Note that compound units are formed by using *, / and \^. For example, an acceleration might
+be in terms of ``m/s\^2'' or meters per second squared. This could also be expressed as``m/s/s''.
Units of Newton-meters (for torque) would be entered as ``N*m''. Parentheses may be used to guarantee
the correct sense of the unit. Kilometers per Ampere-hour could be written as ``km/(A*hr)'' or
``km/A/hr'' but not ``km/A*hr''. The last option would be interpreted as kilometer times hours per Ampere.
@@ -30,6 +30,7 @@ ampere A # electric curren
kelvin K # thermodynamic temperature
mole mol # amount of substance
candela cd # luminous intensity
+decibel dB # log of pressure amplitude
\end{verbatim}
\subsection*{Prefixes}
\begin{verbatim}
@@ -44,6 +45,7 @@ giga G 10^9
mega M 10^6
kilo k 10^3
hecto h 10^2
+deca D 10^1
deci d 10^-1
centi c 10^-2
@@ -62,9 +64,11 @@ yocto y 10^{-24}
# name symbol comment
gram g # mass
-hour hr # time
minute min # time
+hour hr # time
+hour h # time
day day # time
+day days # time
year yr # time
pound lb # mass
ounce oz # mass
@@ -96,6 +100,10 @@ ohm ohm # electric resist
ohm ohms # electric resistance
ohm Ohm # electric resistance
ohm Ohms # electric resistance
+mho mho # electric conductance
+mho mhos # electric conductance
+mho Mho # electric conductance
+mho Mhos # electric conductance
siemens S # electric conductance
farad F # electric capacitance
tesla T # magnetic flux density
@@ -107,14 +115,23 @@ steradian sr # solid angle
lumen lm # luminous flux
lux lx # illuminance
becquerel Bq # activity (radioactive)
+curie Ci # activity (radioactive)
gray Gy # absorbed dose (of radiation)
sievert Sv # dose equivalent (dose equivalent index)
astroUnit AU # mean distance earth to sun
celcius degC # multiplicatively OK
-farenheight degF # multiplicatively OK
+fahrenheit degF # multiplicatively OK
molarity M # chemisty
amu amu # atomic mass unit
amu u # atomic mass unit
+lightspeed c # speed of light
+cubiccentimeter cc # cubic centimeter
+electroncharge e # elementary charge
+hbar hbar # Planck constant
+milesperhour mph # miles per hour
+rpm rpm # rounds per minute
+rpm rpms # rounds per minute
+parsec pc # parsec
\end{verbatim}
\subsection*{Interpretation}
The coded units are interpreted in the order of basic unit,