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Physical Quantities + Units:
There are 7 base quantities with 7 base units

Base Quantity Symbol Base Unit Symbol
time t second s
length l metre m
mass m kilogram kg
temperature T, kelvin K
electric current I ampere A
amount of substance n mole mol
(luminous intensity) - candela…

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resistance ohm ()

Homogeneity of Equations:

The base units of each part of an equation must be the same. When true, this is said to be homogeneous.

E.g. kinetic energy = ½ x mass x velocity2

Unit of kinetic energy = joule = kg m2 s-2
Unit of ½ x…

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Helpful But the derivations were a bit awkward units wise.

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