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1) Physical Quantities
2) Units
3) Measurements
by Tan Hui Kuan
# 1) Physical Quantities
2) Units
3) Measurements

## Physical Quantities
(e.g 10.0 cm)

### Magnitude (10.0)

### Suitable Units (cm)

### Prefixes

### 1. Scalar quantities are described by a magnitude only.

### 2. Vector quantities are
described by both magnitude
and direction.

## SI Units

### 7 Base Units
- length (m)
- Time (s)
- mass (kg)
- Electric Current (A)
- Temperature (K)
- Amount of Substance (mol)

### Derived Quantity (m2)

## Measurement

### Length

### Time

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Metre Rule (Precision = 0.1 cm)

Vernier Caliper (Precision = 0.01 cm)

Micrometer Screw Gauge (Precision = 0.01 mm)

Zero Error

Stopwatch

Oscillation of a Pendulum, Formula: T =

Ticker Timer