1Measurements
The comparisons of any physical quantity with a certain basic [arbitrarily chosen, internationally accepted] reference standard
2Units
Basic [arbitrarily chosen, internationally accepted] reference standard. The RESULT of a measurement is expressed by a number followed by a Unit ---》 50 cm or 10 kg
3What are the 2 Types of Units?
1. Fundamental / Basic Units. 2. Derived Units
4Fundamental / Basic Units
the unites for the fundamental of BASE qualities. E.G. length - m , time - s , mass - kg
5Derived Units
the units derived from fundamental units. E.G. velocity - m/s , acceleration - m/s2
6What are the [4] Types of System of Units ?
1. CGS system- (cm, g, s) 2. FPS system - (Foot, Pound, Seconds) 3. MKS system - (m, kg, s) 4. S.I. unit -- International System of Units ( 'Systeme Internationale d'Unites')
7What the format of the Systems of Unit such as CGS, FPS & MKS?
length, mass , time
8What are the FUNDAMENTAL [BASIC] Units? [7]
There are Seven of them : Length (m) , Mass (kg) , Time (s), Electric Current (A) , Temperature (K) , Amount of substance (mol) , Luminous Intensity (cd)
9What are the Supplementary Units? [2]
1. Plane Angle (radian) 2. Solid Angle (Steradian)