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December 24, 2020

Sound| Do you know, What is Echo & Reverberation?| Science : Class – 9th

SOUND – ECHO The repetition of sound caused by the reflection of sound waves is called an echo. An echo is heard when sound is reflected from a hard surface such as a tall brick wall or a cliff. A soft surface tends to absorb sound, so there is no echo. The human ear can hear two sounds separately only […]

Aniket Sir CBSE Model Paper 0 1 min read

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