UNITS & MEASUREMENTS
FUNDAMENTAL QUANTITIES:-
Length Meter (m)
Mass Kilogram(Kg)
Time Second(sec)
Electric current Ampere(A)
Thermodynamics Kelvin(k)
temperature
Amount of Mole(mol)
substance
Luminous Intensity Candela(Cd)
Small angle approximation
If 𝜃 → 0 then,
sin 𝜃 ≈ 𝜃 ; cos 𝜃 ≈ 1 ; tan 𝜃 ≈ 𝜃
General Conversion
1m= 100cm= 1000mm
12inch= 1foot; 1inch= 2.54 cm
𝜋 180
1° = 𝑎𝑛𝑑 1𝑟𝑎𝑑 =
180 𝜋
′
1 ° ′′
1 °
1 = ( ) 𝑎𝑛𝑑 1 = ( )
60 3600
1𝑚3 =1000lit.
Decca 101 Deci 10−1
Hecto 102 Centi 10−2
Kilo 103 Milli 10−3
Mega 106 Micro 10−6
Giga 109 Nano 10−9
Tera 1012 Pico 10−12
Peta 1015 Femto 10−15
Dimensions
[𝑥]=[𝑀𝑚 𝐿𝑙 𝑇 𝑡 𝐴𝑎 𝐶𝑑𝑐𝑑 𝐾 𝑘 𝑚𝑜𝑙 𝑚𝑜𝑙 ]
Where symbols have their usual meanings.
FUNDAMENTAL QUANTITIES:-
Length Meter (m)
Mass Kilogram(Kg)
Time Second(sec)
Electric current Ampere(A)
Thermodynamics Kelvin(k)
temperature
Amount of Mole(mol)
substance
Luminous Intensity Candela(Cd)
Small angle approximation
If 𝜃 → 0 then,
sin 𝜃 ≈ 𝜃 ; cos 𝜃 ≈ 1 ; tan 𝜃 ≈ 𝜃
General Conversion
1m= 100cm= 1000mm
12inch= 1foot; 1inch= 2.54 cm
𝜋 180
1° = 𝑎𝑛𝑑 1𝑟𝑎𝑑 =
180 𝜋
′
1 ° ′′
1 °
1 = ( ) 𝑎𝑛𝑑 1 = ( )
60 3600
1𝑚3 =1000lit.
Decca 101 Deci 10−1
Hecto 102 Centi 10−2
Kilo 103 Milli 10−3
Mega 106 Micro 10−6
Giga 109 Nano 10−9
Tera 1012 Pico 10−12
Peta 1015 Femto 10−15
Dimensions
[𝑥]=[𝑀𝑚 𝐿𝑙 𝑇 𝑡 𝐴𝑎 𝐶𝑑𝑐𝑑 𝐾 𝑘 𝑚𝑜𝑙 𝑚𝑜𝑙 ]
Where symbols have their usual meanings.
