Template:Keywords: SI base units: Difference between revisions

Revision as of 15:29, 5 June 2020

Bioblast links: SI base units - >>>>>>> - Click on [Expand] or [Collapse] - >>>>>>>

Entity, count, and number, and SI base quantities / SI base units

Quantity name	Symbol	Unit name	Symbol	Comment
entity	X_E	counting unit	[x]	X_E, X_B; [x] not in SI
count	N_E	counting unit	[x]	N_E, N_B; [x] not in SI
number	N	-	dimensionless	= N_E·X_E^-1
amount of substance	n_E	mole	[mol]	n_E, n_B
electric current	I	ampere	[A]	A = C·s^-1
time	t	second	[s]
length	l	meter	[m]	SI: metre
mass	m	kilogram	[kg]
thermodynamic temperature	T	kelvin	[K]
luminous intensity	I_V	candela	[cd]

Fundamental relationships

» Avogadro constant

SI and related concepts

» International System of Units

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-:::: '''Base quantities''', entity and count / '''SI base units'''
+:::: '''Entity, count, and number, and SI base quantities''' / '''SI base units'''
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 | [[count]] || ''N''<sub>E</sub> || counting unit || [x] || ''N''<sub>E</sub>, ''N''<sub>B</sub>; [x] not in SI
+|-
+| number || ''N'' || - || dimensionless || = ''N''<sub>E</sub>·''X''<sub>E</sub><sup>-1</sup>
 |-
 | [[amount of substance]] || ''n''<sub>E</sub> || [[mole]] || [mol] || ''n''<sub>E</sub>, ''n''<sub>B</sub>