Chapter 40- Sound Flashcards Preview

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Flashcards in Chapter 40- Sound Deck (7)
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1

Experiment to prove:
Sound needs a medium to travel

Alarm clock put in a bell jar ,
Set off
Air pumped from it

2

Experiment to prove:
Sound is an energy

Speaker produces sound
Sound waves push table tennis ball on a string

Energy-> power to move

3

Echo

The reflection of sound

4

Speed of sound

340mps

5

Volume is measure in

Decibels

6

Sound becomes harmful over

70 decibels

7

To travel, sound needs _____

A medium