Symbols and Units Used on this Site

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Wondering what each symbol refers to?

A list of the symbols and units used on this site.  The units are in "SI units.  If you have these quantities in any other units, you will need to convert to SI units before putting numbers in formulae".

<br />
\begin{tabular}{ |r l l|}<br />
\hline<br />
  Symbol & Meaning & SI Units\\ \hline<br />
  $h$ & = height & m \\<br />
  $w$ & = width & m \\<br />
  $l$ & = length & m \\<br />
  $y$ & = position & m \\<br />
  $r$ & = radius & m\\<br />
  $\theta$ & = angle & rad \\<br />
  $\pi$ & = pi & none\\<br />
  $d$ & = diameter, thickness, distance & m\\<br />
  $x$ & = thickness & m \\<br />
  $v$ & = velocity & m/s \\<br />
  $t$ & = time & s\\<br />
  $g$ & = acceleration due to gravity & m/s$^2$ \\<br />
  $a$ & = acceleration & m/s$^2$\\<br />
  $m$, $M$ & = mass & kg\\<br />
  $F$ & = force & N = kg$\cdot$m/s$^2$\\<br />
  $p$ & = pressure & Pa = N/m$^2$ = kg/(m$\cdot$s$^2$)\\<br />
  $\rho$ & = density & kg/m$^3$\\<br />
$E$ & = energy & J = kg$\cdot$m$^2$/s$^2$\\<br />
$KE$ & = kinetic energy & J \\<br />
$U$ & = potential energy & J \\<br />
$P$ & = power & W = kg$\cdot$m$^2$/s$^3$\\<br />
$W$ & = work & J \\<br />
$Q$ & = volume flow rate, heat or heat loss & m$^3$/s, W \\<br />
$C_D$ & = coefficient of drag & none\\<br />
$\mu _{RR}$ & = coefficient of rolling resistance & none\\<br />
$F_R$ & = force of rolling friction & N = kg$\cdot$m/s$^2$\\<br />
$D$ & = drag force & N \\<br />
$\eta$ & = efficiency & none\\<br />
$\epsilon, e$ & = emissivity & none\\<br />
$k$ & = thermal conductivity & W/(m$\cdot$K)\\<br />
$c$ & = specific heat capacity & J/(K$\cdot$kg)\\<br />
$T$ & = temperature & K \\<br />
$\tau$ & = thermal time constant & s\\<br />
$I$ & = intensity & W/m$^2$ \\<br />
$S$ & = solar constant & W/m$^2$ \\<br />
$f$ & = frequency & Hz = s$^{-1}$\\<br />
$\lambda$ & = wavelength, wave spacing & m\\<br />
$\Gamma$ & = metabolic rate & W\\<br />
$I$ & = current & A\\<br />
$V$ & = voltage & V\\<br />
$q$ & = electric charge & C = A$\cdot$s \\<br />
$^{\circ}$ & = degree & none \\<br />
$A$ & = Area & m$^2$ \\<br />
$R$ & = R-Value & m$^2\cdot$K/W \\<br />
$\sigma$ & = Stephan Boltzman & W/(m$^2\cdot$K$^4$) \\<br />
\hline<br />
\end{tabular}<br />

Comments

Very useful for learners.

Very useful for learners. Thank u.

Thanks you, very helpful!

Thanks you, very helpful!

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