metre is the standard base unit for length.
metre is the standard base unit for length.
what is the standard base unit for length?
metre
today the value of the speed of light "c" in si units is not subject to measurement error, because the si base unit of length, the metre, is now "defined" as the length of the path travelled by light in vacuum during a time interval of of a second. hence the value of "c" is now exact by definition, and contributes no uncertainty to the si equivalents of the planck units. the same is true of the value of the vacuum permittivity "ε", due to the definition of ampere which sets the vacuum permeability "μ" to and the fact that "μ""ε" = . the numerical value of the reduced planck constant "ħ" has been determined experimentally to 12 parts per billion, while that of "g" has been determined experimentally to no better than 1 part in (or parts per billion). "g" appears in the definition of almost every planck unit in tables 2 and 3, but not all. hence the uncertainty in the values of the table 2 and 3 si equivalents of the planck units derives almost entirely from uncertainty in the value of "g". (the propagation of the error in "g" is a function of the exponent of "g" in the algebraic expression for a unit. since that exponent is ± for every base unit other than planck charge, the relative uncertainty of each base unit is about one half that of "g". this is indeed the case; according to codata, the experimental values of the si equivalents of the base planck units are known to about 1 part in , or parts per billion.)
planck units
bullet::::- iso/iec 23360-5:2006 linux standard base (lsb) core specification 3.1 — part 5: specification for ppc32 architecture









































bullet::::- iso/iec 23360-6:2006 linux standard base (lsb) core specification 3.1 — part 6: specification for ppc64 architecture









































bullet::::- iso/iec 23360-7:2006 linux standard base (lsb) core specification 3.1 — part 7: specification for s390 architecture









































bullet::::- iso/iec 23360-8:2006 linux standard base (lsb) core specification 3.1 — part 8: specification for s390x architecture









































there is also iso/iec tr 24715:2006 which identifies areas of conflict between iso/iec 23360 (the linux standard base 3.1 specification) and the iso/iec 9945:2003 (posix) international standard.
linux standard base