The wave equation

3 marks · Normal

A tuning fork produces sound waves in air with a frequency of 440 Hz. The speed of sound in air is 330 m/s. Calculate the wavelength of the sound waves.

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0.75 m (±0.02)

Also accept: 0.75

Common mistakes: 330/440 = 0.75 (no unit)

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Marking points

M1 · 1 mark · Rearranges wave equation correctly:

M2 · 1 mark · Substitutes correct values.

A1 · 1 mark · Calculates wavelength: 0.75 m (2 or 3 significant figures if working is shown).

Worked solution

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