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UNITS AND MEASUREMENTS - Coggle Diagram

- - - - As a tool to derive new relations
  - - - It gives no information whether a physical quantity is a scalar or a vector quantity
    - - We cannot derive the formulae containing trigonometrical functions, exponential functions, log functions etc. which have no dimensions.
- - - - For multiplication or division, the final result should retain as many significant figures as are in the original number with least significant figures
      - For addition or subtraction, the final result should retain as many significant figures as there are in the original numbers with the least precise measurement.
  - - - The accuracy in the measurement of a quantity is a measure of how close the measured value is to the true value of the quantity
    - - Constant error, Least count error
      - Systematic error - - - Instrumental error, Personal error and Natural error
      - Random errors
  - - - Absolute value
    - - Mean absolute error