Physics A-Level
SI units and unit consistency
What SI units and unit consistency means in Physics A-Level, as defined for OCR.
Definition of SI units and unit consistency
Check what you remember
Read the wording for your board, then hide it and explain SI units and unit consistency in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Speed v is in metres per second (m s⁻¹), frequency f in hertz (Hz), and wavelength λ in metres (m).
Topics that use SI units and unit consistency
- Wave motion (OCR A-Level)
Related terms
- Amplitude
- Compressions and rarefactions
- Diffraction and gap-to-wavelength ratio
- Displacement
- Displacement–distance graph
- Frequency
- Frequency as a source-determined property
- Intensity
Using SI units and unit consistency in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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