Questions & Answers
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2.What is 'Mach Number' ?
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3.How do Bats travel in the dark ?
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4.What is Sonar ? Explain ?
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5.What is the speed of sound in Diamonds ?
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6.What is the speed of sound in Air ?
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7.What is the speed of sound in Vaccum ?
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| 1.The child who had put his one ear on the wooden desk heard the sound more loudly and clearly. This is because sound travels more fastly through solids than in air.More over , that child got more vibrations from the desk. |
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| 2.Mach Number = | Speed of the Object Speed of the sound in air |
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| 3.Some animals use Ultrasonic waves in a specialized technique called Echolocation that allows them to feel objects and other animals ,even in the dark. Using echolocation techinique bats travel in the dark . Bats produce ultrasonic waves while travelling in the dark and these waves reflects when it is falling on the objects which are on the bats way and the reflected waves will come back to the bats . Thus bats will know if there is any objects in the way.Thus it can divert its direction . |
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| 4.SONAR stands for 'Sound Operated Navigation And Ranging'. SONAR is used in navigaion of ships , to map sea beds , and in submarines. Most Important use of Ultrasounds is in Sonar . |
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| 5.The speed of sound in Diamond is 12,000 m/s. |
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| 6.The speed of sound in Air is 346 m/s. |
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| 7.The sound does not travel through vaccum, because there is no medium in vaccum |
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