Question

what is Echo ??????????​

Answer 1

Explanation:

The factors affecting the turning effect of a body are: i) The magnitude of a force applied. ii) The distance of the line of action of the force from the axis of rotation. ... ii) The force acts normal to the surface of the table top i.e., opposite to the direction of the force due to the weight of the body.

Answer 2

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Echo is the sound heard after reflection from a rigid surface such as a cliff, a hillside, the wall of a building etc. So from the rigid surface because the sound heard after the reflection.

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An echo is a sound that is repeated because the sound waves are reflected back. Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ground. Although the direction of the sound changes, the echo sounds the same as the original sound.

乂Miss ᭄✿Innocent࿐