Edexcel IGCSE Physics 3.23 Sound waves
Practise recognising sound as a longitudinal wave, checking true statements, and explaining how particle spacing affects its speed.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- distinguish longitudinal sound waves from electromagnetic waves or transverse waves
- explain faster sound in liquids by linking closer particles to transferred vibrations
3.23 Sound waves question 1
[Maximum number: 3]
This question is about sound waves.
Question (a)
(a)
Sound is an example of a type of wave.
State the name of this type of wave.
[ 1 ]
longitudinal;
Question (b)
(b)
The speed of sound in liquids is greater than the speed of sound in gases.
[ 2 ]
Question (i)
(i)
Suggest why the speed of sound in liquids is greater than the speed of sound in gases.
[ 2 ]
- sound travels by vibrations
- vibrations / sound / waves / energy are passed on more effectively because particles are closer together
Accept:
- oscillations for vibrations
- sound vibrates particles
- faster / easily / efficiently for effectively
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