IGCSE · 3 · multiple choice
Waves · Question 6
Waves · Original GioPhysics question with a detailed, mark-by-mark answer guide.
- Demand
- recall
- Marks
- 1
- Topics
- 1
- Answer
- Complete
multiple choice1 mark
In which material does sound travel fastest?
- A
air
- B
a vacuum
- C
water
- D
steel
Ready to self-mark?Reveal the detailed answer guide
Answer overviewCorrect answer: D — steel
01
1 markAnswer and reasoning
How to approach it
Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.
- 1
The correct choice is D: steel
- 2
B is set for the candidate who confuses sound with light: sound needs a medium and does not travel through a vacuum at all.
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