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physical quantities,unit and measurements - Coggle Diagram

- - - - Time: second: S
      - Temperature:kelvin:k
      - electric current:ampere:A
- - - - Centi
        
        c
        
        × 10⁻²
        
        Milli
        
        m
        
        × 10⁻³
        
        Micro
        
        μ
        
        × 10⁻⁶
        
        Nano
        
        n
        
        × 10⁻⁹
- - - - Measuring tape
      - Up to several metres
      - 0.1 cm
      - Metre rule
        
        0 – 100 cm
        
        0.1 cm
        
        Vernier calipers
        
        0 – 15 cm
        
        0.01 cm
        
        Micrometer screw gauge
        
        0 – 2.5 cm
        
        0.001 cm
- - - - Human reaction time is 0.2 s – 0.5 s.
      - Although the stopwatch shows 2 decimal places, the 2nd decimal place is unreliable due to reaction time.
      - Timings are therefore recorded to 1 decimal place.