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Echoes in Physics

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Echoes in Physics

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Quiz on sound and echoes for grade 9.

Created by

Dew Physics
Dew Physics
United Arab Emirates

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Echoes in Physics
 

Echoes in PhysicsOnline version

Quiz on sound and echoes for grade 9.

by Dew Physics
1

What speed does sound travel at sea level in air (approx)?

2

An echo is heard 3.0 s after the sound is produced. How far away is the reflecting surface?

3

Which property of sound changes when distance to the wall increases?

4

In a quiet room, which factor most affects echo clarity?

5

What does an echo require to be heard?

6

If the distance to the wall doubles, the echo arrives how later?

7

Which unit measures sound intensity best?

8

What happens to the frequency of the echo compared to the original sound?

9

Which material is most likely to produce a clear echo?

10

Why does sound speed vary with temperature?

 
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