Units of Measurement
Every measurement has to have a value and a unit.
The value is the number you have measured
The unit shows us what you have been measuring
| Quantity | Unit | Method of measurement | ||
| Distance | Metre (m) Centimetre(cm) |
Use a metre rule | ||
| Time | Second (s) | Stop watch, timer | ||
| Mass | Kilogram (kg) Gram (g) |
Use a top pan balance | ||
| Force | Newton (N) | Spring balance (newton metre) | ||
| Weight | Newton (N) | Spring balance or scales | ||
| Energy | Joules (J) | Energy meter | ||
| Pressure | Newtons per square centimetre (N/cm2) | Use the formula:
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| Density | Grams per cubic centimetre (g/cm3) | Use the formula :
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| Volume |
Cubic centimetre (cm3) | For a rectangular block use the formula V= height x width x lengthFor a liquid, use a measuring cylinder. |
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| Volume of a liquid | Millilitre (ml) | |||
| Area | Square centimetre (cm2) | use the formula:area = length x width | ||
| Current | amp, (A) | Use an ammeter | ||
| Voltage | Volt (V) | Use a voltmeter | ||
| Temperature | Degrees Celsius (E C) | Use a thermometer | ||
| Speed | Metres per second (m/s) | Use the formula:
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