DP Physics (first assessment 2025)

Question 21M.2.SL.TZ2.b.iii

Date	May 2021	Marks available	[Maximum mark: 2]	Reference code	21M.2.SL.TZ2.b.iii
Level	SL	Paper	2	Time zone	TZ2
Command term	Determine	Question number	b.iii	Adapted from	N/A

b.iii.

[Maximum mark: 2]

21M.2.SL.TZ2.b.iii

Between the first and second positions of maximum loudness, the tube is raised through 0.37 m. The speed of sound in the air in the tube is 320 m s⁻¹. Determine the frequency of the sound emitted by the loudspeaker.

[2]

Markscheme

$λ = 0.74 « m »$ ✓

$f = « \frac{c}{λ} = \frac{320}{0.74} = » 430 « Hz »$ ✓

Allow ECF from MP1

Syllabus sections

C. Wave behaviour » C.4 Standing waves and resonance

Question 21M.2.SL.TZ2.b.iii

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