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An Observer Stands at a Distance of 850 M from a Cliff and Fires a Gun. After What Time Gap Will He Hear the Echo? If Sound Travels at a Speed of 350 M/Sec., in Air. - Physics

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प्रश्न

An observer stands at a distance of 850 m from a cliff and fires a gun. After what time gap will he hear the echo? If sound travels at a speed of 350 m/sec., in air.

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उत्तर

Given: d = 850 metre, t = ?, speed v = 350 m/s
∴ t = `"2d"/"v"`
⇒ t = `(2xx850)/350`
⇒ t = `(2xx17)/7`
= 4.86 sec.

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अध्याय 6: Echoes and Vibrations of Sound - Short Numerical

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आईसीएसई Physics [English] Class 10
अध्याय 6 Echoes and Vibrations of Sound
Short Numerical | Q 10
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