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Mechanics

Blazing goIITian

Joined:	31 Jan 2007
Post:	1069

16 Sep 2007 22:37:41 IST

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264

conceptual waves doubt

None

An echo repeats 2 syllables

if the velocity of sound is 330 m/sec

then the distance of reflecting surface is

Ans 66 m

Please give me a detailed solution i am getting confused with syllables

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Bhupesh Mohanty

Moderator

Joined: 29 Dec 2006

Posts: 1037

21 Sep 2007 20:28:39 IST

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one syllable = 1/10 second which is equals to minimum duration between two sounds so that they can be recognized by human ear .

Priyesh

Blazing goIITian

Joined: 18 Feb 2007

Posts: 1042

22 Sep 2007 08:39:47 IST

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the echo repeats two syllables

one syllable is 1/10 second

therefore two syllable is equal to 1/5 sec

speed = 330 m/sec

therefore distance travelled = speed * time = 330 * 1/5 = 66

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