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FUNDAMENTAL QUANTITIES

– FUNDAMENTAL QUANTITIES –

The physical quantities are organized in a dimensional system built on seven fundamentals, each of which is considered in itself and having its own size, here are the magnitudes of the fundamental and the table of symbols used to indicate :

Name

of the greatness

 

Symbol

of the greatness

 

Name basic measurement unit

 

Symbol unit of measure

 

Symbol

in the calculation

dimensional

 

length l metro m [L]
pulp m kilogram kg [M]
time t

 

second

 

s

 

[T]

 

electric current I ampere A

 

[I]
thermodynamic temperature T kelvin K [Q]
quantity of the substance B nB amount of B mol(B)

 

[N]

 

light intensity In candle

 

cd

 

[J]

 

The other physical quantities are called derived quantities and they are treated as if they have dimensions derived algebraically by the seven fundamental.

 

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