permeability - Maple Help

Units of Permeability

Description

 • Permeability has the dimension time per length. The SI composite unit of permeability is the kilogram per pascal meter squared second or second per meter.
 • Maple knows the units of permeability listed in the following table.

 Name Symbols Context Alternate Spellings Prefixes perm 0degC * perms SI 23degC SI

 An asterisk ( * ) indicates the default context, an at sign (@) indicates an abbreviation, and under the prefixes column, SI indicates that the unit takes all SI prefixes, IEC indicates that the unit takes IEC prefixes, and SI+ and SI- indicate that the unit takes only positive and negative SI prefixes, respectively.  Refer to a unit in the Units package by indexing the name or symbol with the context, for example, perm[0degC]; or, if the context is indicated as the default, by using only the unit name or symbol, for example, perm.
 The units of permeability are defined as follows.
 A 0 degree Celsius perm is defined as approximately $5.721,3.5×{10}^{-10}$ kilogram per pascal square meter second.
 A 23 degree Celsius perm is defined as approximately $5.745,2.5×{10}^{-10}$ kilogram per pascal square meter second.

Examples

 > $\mathrm{convert}\left('\mathrm{perm}','\mathrm{dimensions}','\mathrm{base}'=\mathrm{true}\right)$
 $\frac{{\mathrm{time}}}{{\mathrm{length}}}$ (1)
 > $\mathrm{convert}\left(1,'\mathrm{units}','\mathrm{perm}\left[\mathrm{23degC}\right]',\frac{'s'}{'m'}\right)$
 ${5.74525}{×}{{10}}^{{-11}}$ (2)
 > $\mathrm{convert}\left(1,'\mathrm{units}','\mathrm{perm}\left[\mathrm{0degC}\right]',\frac{'\mathrm{kg}'}{'\mathrm{Pa}'{'m'}^{2}'s'}\right)$
 ${5.72135}{×}{{10}}^{{-11}}$ (3)