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1.   A sound wave has a frequency of 5000Hz and wave length of 20cm .how long will it take to travel 1Km.

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1.   A sound wave has a frequency of 5000Hz and wave length of 20cm .how long will it take to travel 1Km.

Asked by M.s.srinidhi21 4th March 2015, 6:08 PM
Answered by Expert
Answer:

Hi Shrinidhi,

begin mathsize 14px style The space speed space of space sound space wave space is space given space as straight v equals nλ therefore straight v equals 5000 cross times 20 cross times 10 to the power of negative 2 end exponent equals 1000 space straight m divided by straight s Hence comma space the space time space taken space by space the space wave space to space travel space 1 space km space is straight t equals straight d over straight v equals fraction numerator 1000 space straight m over denominator 1000 space straight m divided by straight s end fraction equals 1 space straight s end style

Answered by Expert 4th March 2015, 6:13 PM
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