Question

C. Write 'true' or 'false' for the following
statements :
1. Sound travels fastest in metals._______
2. A material medium is not necessary for the
propagation of sound._______
3. Red Indians can find out whether an enemy is approaching their camp by putting their ear to the ground.________
14​

Answer 1

Explanation:

We do not hear sound of explosions from Sun as there is no medium in between. Due to the same reason, a bell ringing inside a vaccuumized jar can not be heard. If we put one ear on an iron rod and hit on the rod, we hear two sounds. One sound of the hit comes through air and another through iron rod. Sound travels faster through solid. So, sound through iron rod will be heard first followed by the sound through air.

Answer By

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Toppr

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Answer 2

Answer:

true

false

true

Explanation:

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