Gce Model Questions Vol1 2017 Physics Question 50

Practice objective / multiple choice question 50 from the 2017 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2017 Physics Objective / Multiple Choice Medium Difficulty
Question 50 GCE_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • objective

A police siren emits sound of frequency \(800\,\text{Hz}\). The siren is mounted on a car that moves in a straight line towards a stationary observer. When the car is approaching, the observer hears a frequency of \(880\,\text{Hz}\). After the car passes the observer and recedes, the observer hears a frequency of \(735\,\text{Hz}\). Assuming the speed of sound in air is \(340\,\text{m s}^{-1}\), determine the speed of the car (in \(\text{m s}^{-1}\), to two significant figures).

Answer Options

Correct Answer A. 30 m s⁻¹ (to two significant figures)
B. 35 m s⁻¹ (to two significant figures)
C. 25 m s⁻¹ (to two significant figures)
D. 40 m s⁻¹ (to two significant figures)
Correct Answer
A
Correct Option:
30 m s⁻¹ (to two significant figures)

About This Question

This is Gce Model Questions Vol1 2017 Physics Question 50. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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