# A student is preparing a poster about scale in physics. The student wants to express five measurements using the most appropriate SI prefix in each case. The measurements are: 4 500 000 000 Hz, 0.000 000 003 m, 250 000 W, 0.001 s, and 6 500 000 000 000 J. State each measurement using the most appropriate SI prefix, giving the correct symbol for each prefix.

> AQA A-Level Physics (7408) — 3.1.1 Use of SI Units and Their Prefixes · State · 5 marks

## Mark scheme (5 marks)

1. 4 500 000 000 Hz expressed as 4.5 GHz (giga, G)
2. 0.000 000 003 m expressed as 3 nm (nano, n)
3. 250 000 W expressed as 250 kW (kilo, k)
4. 0.001 s expressed as 1 ms (milli, m)
5. 6 500 000 000 000 J expressed as 6.5 TJ (tera, T)

## Key terms

- [SI prefix](https://www.gradenine.co.uk/glossary/si-prefix)

## Related

- [Revision notes for AQA A-Level Physics (7408)](https://www.gradenine.co.uk/learn)
- [How to answer "State" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-is-preparing-a-poster-9e660ce4) · Published by Druglandscape Ltd.