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What is measurement ? / International system of unit (SI UNIT) Measurement -                                          In the measurement two component are required Unit and Numerical value . What is unit?                          Measurement of any physical quantity involves comparison with a certain basic  , international accepted reference standard called unit.  Numerical value-                               The measurement of physical quantity expressed by a number .                   Ex- 45 kg, 45- numerical value , kg - unit of mass What is Physical quantity?                            The quantity which c...
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  What is physics ?   PHYSICS is generated by Greek language  the word FUSIS  means "to know". Initial day Physics also known as Natural Science . In daily life many phenomenon are like- sun rise , change in season,Solar eclipse ,Lunar eclipse etc.  ☝ In nature two object are present - Matter and Energy         Energy= Mass x (velocity of light in vacuum )2  Types of Physics - Physics mainly divided in to two parts -(1) Macroscopic (2) Microscopic  According to Macroscopic Physics are five parts (1) Mechanics (2) Thermodynamics (3) Optics (4) Oscillation and waves (5)Electrodynamics According to microscopic Physics only one parts (1) Nuclear physics