SI units should be used with all physical quantities, where appropriate.
Higher Physics Relationship Sheet Help.pdf
Prefixes should be used where appropriate.
| Prefix | Literary Meaning | Numeric Meaning |
|---|---|---|
| $p$ | pico— | $10^{-12}$ |
| $n$ | nano— | $10^{-9}$ |
| $\mu$ | micro— | $10^{-6}$ |
| $m$ | milli— | $10^{-3}$ |
| $c$ | centi— | $10^{-2}$ |
| $k$ | kilo— | $10^3$ |
| $M$ | mega— | $10^6$ |
| $G$ | giga— | $10^9$ |
| $T$ | tera— | $10^{12}$ |
The appropriate number of significant figures should be used in final answers.
This means that the final answer can have no more significant figures than the value with least number of significant figures used in the calculation.