Question
(d) Apabila bunyi merambat melalui air, nyatakan apa yang berlaku kepada laju gelombang bunyi.
When sound wave travels through water, state what happens to the speed of wave.
Answer
Hi Farhaini,
Sound is caused by vibration of particles. And we know that in air, the arrangement of particles are more spaced out; while the particles are closer together in water.
So it is easier for the vibration to be transmitted across the water.
Here are some other interesting ways of explaining this by different people (Some of which are quite advanced so feel free to ignore those)
Why does sound travel faster in water than air? - Quora
Hope this helps! 
2 Likes
Thank you very much for the info ! 
1 Like