Sound

Question 1

What is sound?

Answer 1

Sound is a form of energy, which is caused by vibrations

Question 2

How do you verify that sound is a form of energy?

Answer 2

1. Hang a table tennis ball from a split cork clamped in a retort stand
2. Place a loudspeaker beside it and turn the speaker on
3. The ball moves showing the transfer of sound to kinetic energy

Question 3

What is the speed of sound?

Answer 3

340 m s-1 (s to the power of -1)

Question 4

What are echoes?

Answer 4

Echoes are sounds that are reflected from a surface