Question

Answer the question 6 and 7 ...

Plz don't copy paste from google.Give your own answer and don't give unwanted answer.
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Answer 1

Answer:

$\huge{ \underline{ \mathtt{ \red{ ☆A} \pink{N} \green{S} \blue{W} \purple{E} \orange{R}}}}$

Explanation:

Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another.

7.(a)20 Hz to 20 kHz

(b)Sounds having frequency higher than 20,000 Hz are known as ultrasonic sounds.

Sounds having frequency lower than 20 Hz are known as infrasonic sounds.

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thanks for asking;)

Answer 2

Explanation:

An object at rest remains at rest, or if in motion, remains in motion at a constant velocity unless acted on by a net external force.

newtons first law for your knowledge