Question

Q1. WHAT IS A WAVE ?

Q2. DEFINE ECHO ?

Answer 1

Answer:

WAVE : wave is a disturbance that travels through space and matter transferring energy from one place to another.

ECHO: echo is a reflection of sound that arrives at the listener with a delay after the direct sound.

hope it helps. .. ..

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Answer 2

Explanation:

echo is a bouncing back of sound caused by a reflecting surfaces. I hope that helps you.