Physical quantities and units

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Physical quantities and units by Mind Map: Physical quantities and units

1. quantites

1.1. length

1.1.1. metre m

1.2. mass

1.2.1. kilogram kg

1.3. time

1.3.1. second s

1.4. electric current

1.4.1. ampere A

1.5. temperature

1.5.1. kelvin K

1.6. amount of substance

1.6.1. mole mol

1.7. luminous intensity

1.7.1. candela

2. prefixes in units

3. length

3.1. metre

3.1.1. the length of the path travelled by light in a vacuum during a time interval of 1/299792458 of a second

3.1.2. metre rule measures max distance of 1.000m measure up to accuracy of 1mm or 0.001m place eye vertically over ruler to avoid parallax error

3.2. vernier caliper

3.2.1. measure up to an accuracy of 0.1mm

3.3. micrometer

3.3.1. measure up to an accuracy of 0.01mm

4. mass

4.1. quantity of matter a body contains

4.1.1. electronic balance

5. time

5.1. digital stopwatch

5.1.1. accuracy of 0.01s

5.2. analog stopwatch

5.2.1. accuracy of 0.1s