SI - Maple Help

The International System of Units (SI)

Description

 • The International System of Units (SI) has the meter, kilogram, second, ampere, kelvin, mole, and candela as its base units.
 • When used in conjunction with the UseSystem command, the SI system sets the following units for the given dimensions.

 Dimension Name Unit Name length meter mass kilogram time second force newton pressure pascal energy joule power watt electric capacitance farad electric charge coulomb electric conductance siemens magnetic inductance henry electric potential volt electric resistance ohm illuminance lux luminous flux lumen magnetic flux weber magnetic flux density tesla plane angle radian solid angle steradian

SI Base Units

 Dimension Name Unit Name Unit Symbol length meter m mass kilogram kg time second s electric current ampere A thermodynamic temperature kelvin K amount of substance mole mol luminous intensity candela cd

SI Derived Units with Special Names and Symbols

 Dimension Name Unit Name Symbol In Terms of Other SI Units angle, plane radian rad 1 = m/m(radius) angle, solid steradian sr 1 = m^2/m(radius)^2 Celsius temperature degree[Celsius] degC K electric capacitance farad F C/V electric charge coulomb C A*s electric conductance siemens S A/V electric inductance henry H Wb/A electric potential volt V W/A electric resistance ohm Omega V/A energy (work) joule J N*m force newton N kg*m/s^2 illuminance lux lx lm/m^2 luminous flux lumen lm cd*sr magnetic flux weber Wb V*s magnetic flux density tesla T Wb/m^2 power watt W J/s pressure (stress) pascal Pa N/m^2

Examples

Notes:

 – To enter a unit in 2-D Math input, select the unit from the appropriate Units palette. If the unit you want is not there, select $\mathrm{unit}$ and then enter the unit.
 – When you edit a unit, double brackets appear around it.
 > $\mathrm{with}\left(\mathrm{Units}\left[\mathrm{Standard}\right]\right):$
 > $\mathrm{Units}\left[\mathrm{UseSystem}\right]\left('\mathrm{SI}'\right)$
 > $5\mathrm{Unit}\left(\frac{'\mathrm{tonne}''\mathrm{ft}'}{'s'}\right)$
 ${5}{}⟦\frac{{t}{}{\mathrm{ft}}}{{s}}⟧$ (1)
 > $\mathrm{combine}\left(,'\mathrm{units}'\right)$
 ${1524}{}⟦\frac{{\mathrm{kg}}{}{m}}{{s}}⟧$ (2)
 > $\frac{\mathrm{Unit}\left('h'\right)}{}$
 $\frac{{127}}{{300}}{}⟦{N}⟧$ (3)
 > $\frac{{\mathrm{Unit}\left('\mathrm{cm}'\right)}^{2}}{}$
 $\frac{{12700}}{{3}}{}⟦{\mathrm{Pa}}⟧$ (4)