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<TITLE>International System of Units (SI)</TITLE>
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<FONT SIZE=5><P ALIGN="CENTER">International System of Units (SI)</P>
</FONT><FONT SIZE=4></FONT>
<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#808080" CELLPADDING=7 WIDTH=229>
<TR><TD VALIGN="TOP" COLSPAN=4 BGCOLOR="#c0c0c0">
<P ALIGN="CENTER">SI Base Units</TD>
</TR>
<TR><TD WIDTH="48%" VALIGN="TOP" COLSPAN=2 BGCOLOR="#c0c0c0">
<P ALIGN="CENTER">Quantity</TD>
<TD WIDTH="52%" VALIGN="TOP" COLSPAN=2 BGCOLOR="#c0c0c0">
<P ALIGN="CENTER">Unit</TD>
</TR>
<TR><TD WIDTH="29%" VALIGN="TOP">
<P ALIGN="CENTER">length</TD>
<TD WIDTH="18%" VALIGN="TOP">
<I><P ALIGN="CENTER">d</I></TD>
<TD WIDTH="34%" VALIGN="TOP">
<P ALIGN="CENTER">metre</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P ALIGN="CENTER">m</TD>
</TR>
<TR><TD WIDTH="29%" VALIGN="TOP">
<P ALIGN="CENTER">time</TD>
<TD WIDTH="18%" VALIGN="TOP">
<I><P ALIGN="CENTER">t</I></TD>
<TD WIDTH="34%" VALIGN="TOP">
<P ALIGN="CENTER">second</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P ALIGN="CENTER">s</TD>
</TR>
<TR><TD WIDTH="29%" VALIGN="TOP">
<P ALIGN="CENTER">mass</TD>
<TD WIDTH="18%" VALIGN="TOP">
<I><P ALIGN="CENTER">m</I></TD>
<TD WIDTH="34%" VALIGN="TOP">
<P ALIGN="CENTER">kilogram</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P ALIGN="CENTER">kg</TD>
</TR>
<TR><TD WIDTH="29%" VALIGN="TOP">
<P ALIGN="CENTER">current</TD>
<TD WIDTH="18%" VALIGN="TOP">
<I><P ALIGN="CENTER">I</I></TD>
<TD WIDTH="34%" VALIGN="TOP">
<P ALIGN="CENTER">ampere</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P ALIGN="CENTER">A</TD>
</TR>
</TABLE>

<FONT SIZE=2>
<P>&nbsp;</P></FONT>
<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#808080" CELLPADDING=7 WIDTH=259>
<TR><TD VALIGN="TOP" COLSPAN=4 BGCOLOR="#c0c0c0">
<P ALIGN="CENTER">Derived Units</TD>
</TR>
<TR><TD WIDTH="49%" VALIGN="TOP" COLSPAN=2 BGCOLOR="#c0c0c0">
<P ALIGN="CENTER">Quantity</TD>
<TD WIDTH="51%" VALIGN="TOP" COLSPAN=2 BGCOLOR="#c0c0c0">
<P ALIGN="CENTER">Unit</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP">
<P ALIGN="CENTER">force</TD>
<TD WIDTH="14%" VALIGN="TOP">
<I><P ALIGN="CENTER">F</I></TD>
<TD WIDTH="32%" VALIGN="TOP">
<P ALIGN="CENTER">newton</TD>
<TD WIDTH="19%" VALIGN="TOP">
<P ALIGN="CENTER">N</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP">
<P ALIGN="CENTER">energy</TD>
<TD WIDTH="14%" VALIGN="TOP">
<I><P ALIGN="CENTER">E</I></TD>
<TD WIDTH="32%" VALIGN="TOP">
<P ALIGN="CENTER">joule</TD>
<TD WIDTH="19%" VALIGN="TOP">
<P ALIGN="CENTER">J</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP">
<P ALIGN="CENTER">power</TD>
<TD WIDTH="14%" VALIGN="TOP">
<I><P ALIGN="CENTER">P</I></TD>
<TD WIDTH="32%" VALIGN="TOP">
<P ALIGN="CENTER">watt</TD>
<TD WIDTH="19%" VALIGN="TOP">
<P ALIGN="CENTER">W</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP">
<P ALIGN="CENTER">voltage</TD>
<TD WIDTH="14%" VALIGN="TOP">
<I><P ALIGN="CENTER">V</I></TD>
<TD WIDTH="32%" VALIGN="TOP">
<P ALIGN="CENTER">volt</TD>
<TD WIDTH="19%" VALIGN="TOP">
<P ALIGN="CENTER">V</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP">
<P ALIGN="CENTER">charge</TD>
<TD WIDTH="14%" VALIGN="TOP">
<I><P ALIGN="CENTER">Q</I></TD>
<TD WIDTH="32%" VALIGN="TOP">
<P ALIGN="CENTER">coulomb</TD>
<TD WIDTH="19%" VALIGN="TOP">
<P ALIGN="CENTER">C</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP">
<P ALIGN="CENTER">resistance</TD>
<TD WIDTH="14%" VALIGN="TOP">
<I><P ALIGN="CENTER">R</I></TD>
<TD WIDTH="32%" VALIGN="TOP">
<P ALIGN="CENTER">ohm</TD>
<TD WIDTH="19%" VALIGN="TOP">
<FONT FACE="Symbol"><P ALIGN="CENTER">W</FONT></TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">torque</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><FONT FACE="Symbol"><P ALIGN="CENTER">T</I></FONT></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">newton-metre</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">N-m</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">frequency</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><P ALIGN="CENTER">f</I></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">hertz</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">Hz</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">angular speed</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><FONT FACE="Symbol"><P ALIGN="CENTER">w</I></FONT></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">revolution per second</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">rev/s</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">angle</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><FONT FACE="Symbol"><P ALIGN="CENTER">a</I></FONT></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">radian</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">rad</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">capacitance</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><P ALIGN="CENTER">C</I></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">farad</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">F</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">inductance</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><P ALIGN="CENTER">L</I></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">henry</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">H</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">pressure</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21><P></P></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">pascal</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">Pa</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">magnetic flux</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><FONT FACE="Symbol"><P ALIGN="CENTER">f</I></FONT></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">weber</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">Wb</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">mag. flux density</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><P ALIGN="CENTER">B</I></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">tesla</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">T</TD>
</TR>
<TR><TD WIDTH="35%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">speed</TD>
<TD WIDTH="14%" VALIGN="TOP" HEIGHT=21>
<I><P ALIGN="CENTER">v</I></TD>
<TD WIDTH="32%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">metre per second</TD>
<TD WIDTH="19%" VALIGN="TOP" HEIGHT=21>
<P ALIGN="CENTER">m/s</TD>
</TR>
</TABLE>

<P>Algebraic variables that represent physical quantities are italicized to distinguish them from unit symbols:<br>
<I><P>V</I> = voltage (quantity)<br>
V = volt (unit)<br>
<I><P>C</I> = capacitance (quantity)<br>
C = coulomb (unit)

<P>A dash or dot separates units that are multiplied together: <B>N-m</P></B>
<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#808080" CELLPADDING=7 WIDTH=183>
<TR><TD VALIGN="TOP" COLSPAN=3 BGCOLOR="#c0c0c0" HEIGHT=22>
<P ALIGN="CENTER">Unit prefixes</TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" BGCOLOR="#c0c0c0" HEIGHT=22>
<P ALIGN="CENTER">Prefix</TD>
<TD WIDTH="36%" VALIGN="TOP" BGCOLOR="#c0c0c0" HEIGHT=22>
<P ALIGN="CENTER">Symbol</TD>
<TD WIDTH="33%" VALIGN="TOP" BGCOLOR="#c0c0c0" HEIGHT=22>
<P ALIGN="CENTER">Value</TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">pico</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">p</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">10<SUP>-12</SUP></TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">nano</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">n</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">10<SUP>-9</SUP></TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">micro</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<FONT FACE="Symbol"><P ALIGN="CENTER">m</FONT></TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">10<SUP>-6</SUP></TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">milli</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">m</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">1/1000</TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">centi</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">c</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">1/100</TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">deci</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">d</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">1/10</TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">kilo</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">k</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">1000</TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">mega</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">M</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">10<SUP>6</SUP></TD>
</TR>
<TR><TD WIDTH="31%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">giga</TD>
<TD WIDTH="36%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">G</TD>
<TD WIDTH="33%" VALIGN="TOP" HEIGHT=22>
<P ALIGN="CENTER">10<SUP>9</SUP></TD>
</TR>
</TABLE>

<FONT SIZE=2>
<P>&nbsp;</P></FONT>
<TABLE BORDER CELLSPACING=1 BORDERCOLOR="#808080" CELLPADDING=7 WIDTH=245>
<TR><TD VALIGN="TOP" COLSPAN=3 BGCOLOR="#c0c0c0" HEIGHT=25>
<P ALIGN="CENTER">Unit Composition</TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">N</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg-m/s<SUP>2</SUP></TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23><P></P></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">J</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">N-m</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg-m<SUP>2</SUP>/s<SUP>2</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">W</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">N-m/s<FONT SIZE=1> </FONT><FONT SIZE=3>=</FONT><FONT SIZE=1> </FONT>J/s</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg-m<SUP>2</SUP>/s<SUP>3</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">A</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">C/s</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23><P></P></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">C</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">A-s</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23><P></P></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=24>
<P ALIGN="CENTER">V</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=24>
<P ALIGN="CENTER">J/C</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=24>
<P ALIGN="CENTER">kg-m<SUP>2</SUP>/A-s<SUP>3</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">Pa</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">N/m<SUP>2</SUP></TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg/m-s<SUP>2</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">F</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">C/V</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">A<SUP>2</SUP>-s<SUP>4</SUP>/kg-m<SUP>2</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">H</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">Wb/A</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg-m<SUP>2</SUP>/A<SUP>2</SUP>-s<SUP>2</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">Wb</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">V-s</TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg-m<SUP>2</SUP>/A-s<SUP>2</SUP></TD>
</TR>
<TR><TD WIDTH="24%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">T</TD>
<TD WIDTH="37%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">Wb/m<SUP>2</SUP></TD>
<TD WIDTH="39%" VALIGN="TOP" HEIGHT=23>
<P ALIGN="CENTER">kg/A-s<SUP>2</SUP></TD>
</TR>
</TABLE>

<P>Units of measure associated with a quantity may be represented by placing the quantity in square brackets:<br>
<B>[current] = ampere</P></B>
<P>Only one solidus (slash) is allowed per unit symbol.<br>
Correct: <B>rad/V-s<br>
</B>Incorrect: <B>rad/s/V</B></BODY>
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