4.2 Flashcards
1
Q
What can and can’t sound travel through?
A
Sound can only travel through matter (solids, liquids and gases) as it requires particles to vibrate. Therefore,
sound cannot travel through a vacuum.
2
Q
What does the speed of sound depend on?
A
The speed of sound depends on how close the particles are, therefore, sound travels faster in solids and liquids than gases.
3
Q
What is the approximate speed of sound in air?
A
The speed of sound in air at 20C is approx. 340ms-1.
4
Q
Can sound waves be reflected?
A
Yes, sound waves can be reflected.
5
Q
How is the reflection of sound waves used in sonar equipment?
A
The reflection of sound waves is used in sonar equipment to calculate the distance between the vessel and other objects using the formula speed = distance/time.
