Answers

2014-12-22T19:28:23+05:30
A) SONAR which stands for Sound Navigation and Ranging is used to navigate and find out the location of objects .It works on the Principle of Echo-location.An ultrasonic sound wave is sent and the time taken by it to return is noted.and the distace of the object is found out ny the formula .: v=2d/t

B)v=2d/t
  
 3 X 10^{8} =2d/2X 10^{-5} 

⇒2d=6X10³
⇒d=3000m
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