Write the Applications of echo
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Echo is used in radar guns to determine the speed of a speeding automobile or the speed of a pitched baseball.
It is also used determine the rotational speed of a storm system by comparing the reflected frequencies from opposite sides of the storm cell.
It is also used in designing concert halls where the object is reduce distortions from reflected sounds from various parts of the hall.
Then you also have underwater sonar to locate the location of submerged objects such as fish or submarines.
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