Physical Quantities
Door Carey Lai
1. Units
1.1. Prefixes
1.2. Overview
2. Time
2.1. SI Unit: Second(s)
2.1.1. Why?
2.2. Stopwatch
2.3. History
3. Length
3.1. SI Unit: Metre(m)
3.1.1. Why?
3.2. Vernier Caliper
3.2.1. Accuracy: 0.01cm
3.3. Micrometer Gauge Screw
3.3.1. 0.001cm
3.4. Metre rule
3.4.1. 0.1cm
3.5. Parallax Error
4. Mass
4.1. SI Unit: kilogram(kg)
4.1.1. Why?
4.2. Electronic Balance
4.3. NOTE: Mass not equals weight!
4.3.1. Weight: Amt of GFF on an object
4.3.2. Mass: Amt of matter in an object