DP Physics (last assessment 2024)

Question 18N.1.HL.TZ0.29

Date	November 2018	Marks available	[Maximum mark: 1]	Reference code	18N.1.HL.TZ0.29
Level	HL	Paper	1	Time zone	TZ0
Command term		Question number	29	Adapted from	N/A

29.

[Maximum mark: 1]

18N.1.HL.TZ0.29

An ambulance siren emits a sound of frequency 1200 Hz. The speed of sound in air is 330 m s^–1. The ambulance moves towards a stationary observer at a constant speed of 40 m s^–1. What is the frequency heard by the observer?

A. $\frac{{1200 \times 330}}{{370}}$ Hz

B. $\frac{{1200 \times 290}}{{330}}$ Hz

C. $\frac{{1200 \times 370}}{{330}}$ Hz

D. $\frac{{1200 \times 330}}{{290}}$ Hz

[1]

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Additional higher level (AHL)

Additional higher level (AHL) » Topic 9: Wave phenomena » 9.5 – Doppler effect

Additional higher level (AHL) » Topic 9: Wave phenomena

Question 18N.1.HL.TZ0.29

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