Difference between revisions of "Template:Base quantities and count"
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:::: * 'Count' is synonymous with 'number of entities' and is one of the most fundamental quantities in physics, but the name, symbol and unit are not included in the SI as a base quantity or base unit. 'Number' and 'number of entities' are different (in German: Zahl ''versus'' Anzahl). The count is not a pure dimensionless number: the dimension is the countable object or entity; the unit [x] indicates how many 'times' different members of the defined entity re-occur in | :::: * 'Count' is synonymous with 'number of entities' and is one of the most fundamental quantities in physics, but the name, symbol and unit are not included in the SI as a base quantity or base unit. An 'entity' is a countable object or event. 'Number' and 'number of entities' are different (in German: Zahl ''versus'' Anzahl). The count is not a pure dimensionless number: the dimension is the countable object or entity; the unit [x] indicates how many 'times' different members of the defined entity re-occur in a defined system (not how many times the same member of the defined entity is re-counted), or how many times a defined event (which is an entity) occurs over a defined period of time. | ||
Revision as of 15:44, 14 May 2020
Base quantity Symbol for quantity Symbol for dimension Name of SI unit Symbol for SI unit length l L meter m mass m M kilogram kg time t T second s electric current I I ampere A thermodynamic temperature T Ξ kelvin K amount of substance n N mole mol luminous intensity Iv J candela cd count; number of entities* NX C times x
- * 'Count' is synonymous with 'number of entities' and is one of the most fundamental quantities in physics, but the name, symbol and unit are not included in the SI as a base quantity or base unit. An 'entity' is a countable object or event. 'Number' and 'number of entities' are different (in German: Zahl versus Anzahl). The count is not a pure dimensionless number: the dimension is the countable object or entity; the unit [x] indicates how many 'times' different members of the defined entity re-occur in a defined system (not how many times the same member of the defined entity is re-counted), or how many times a defined event (which is an entity) occurs over a defined period of time.
