Physics: Measurement

Meldy Miyashita
Mind Map by Meldy Miyashita, updated more than 1 year ago
Meldy Miyashita
Created by Meldy Miyashita about 5 years ago
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Description

Fundamentals of Physics. Includes quantities, uncertainties and measuring instruments.

Resource summary

Physics: Measurement
  1. Quantities
    1. Basic quantities
      1. Definition: A physical quantity that cannot be defined in terms of other physical quantities.
        1. Length (m)
          1. Time (s)
            1. Mass (kg)
              1. Temperature (K)
                1. Luminous Intensity (cd)
                  1. Amount of substance (mol)
                    1. Electric Current (A)
                    2. Derived Quantities
                      1. Definition: A physical quantity that is derived from basic quantities. (no standard definition)
                        1. Density (p, rho) = mass/volume
                          1. Momentum = mass x velocity
                            1. Force (N) = mass x acceleration
                              1. Pressure (Pa) = force/area
                                1. Work done (J) = force/displacement
                                  1. Power (W) = work done/time
                                2. Uncertainty
                                  1. Is the extent of precision of the measurements taken with the intrument.
                                    1. Determined according to the smallest division/graduation on the instrument's scale (in other words, its precision).
                                      1. Measuring instruments, their smallest division and their uncertainty
                                        1. Meter rule - 0.1 cm Uncertainty: +/- 0.1 cm
                                          1. Vernier Caliper (20 division) - 0.05 cm Uncertainty: +/- 0.01 cm
                                            1. Vernier Caliper (10 division) - 0.01 cm Uncertainty: +/- 0.02 cm
                                              1. Micrometer Screw Gauge - 0.01 mm Uncertainty: +/- 0.01 mm
                                                1. Thermometer - 0.5 °C Uncertainty: +/- 03°C (for temperature reading) & +/- 0.5°C (for temperature change)
                                                  1. Stopwatch - 0.01 s Uncertainty: +/- 0.02 s
                                                    1. Electronic Mass Balance - 0.01 g Uncertainty: +/- 0.01 g
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