What is echo ? How is it formed ?...

What is echo ? How is it formed ?

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PRADEEP-SOUND-Long Answer

What are the characteristics of a sound ? Discuss each one of them bri...
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What is echo ? How is it formed ?
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What are multiple echoes ? Discuss any two of their important practica...
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What is ultrasound ? Describe some of its practical applications ?
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What is SONAR ? How is it used to detect an underwater object and meas...
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Discuss the structure of human ear from auditory aspect only.
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