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State two applications of echo....

State two applications of echo.

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ICSE-SOUND-EXERCISE -7(A)
  1. What are mechanical waves ?

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  2. Define the following terms in relation to a wave : amplitude

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  3. Define the following terms in relation to a wave : frequency

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  4. Define the following terms in relation to a wave : wavelength

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  5. Define the following terms in relation to a wave : wave velocity.

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  6. A wave passes from one medium to another medium. Mention one property ...

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  7. A wave passes from one medium to another medium. Mention one property ...

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  8. State two factors on which the speed of a wave travelling in a medium ...

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  9. State two differences between light and sound waves.

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  10. What do you mean by reflection of sound ? State one condition for the ...

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  11. What is meant by an echo ? State two conditions necessary for an echo ...

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  12. A man is standing at a distance of 12 m from a cliff. Will he be able ...

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  13. State two applications of echo.

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  14. Explain how the speed of sound can be determined by the method of echo...

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  15. State the use of echo by a bat, dolphin and fisherman.

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  16. How do bats avoid obstacles in their way, when in flight?

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  17. What is meant by sound ranging ? Give one use of sound ranging,

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  18. Name the waves used for sound ranging. State one reason for their use....

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  19. What is the principle on which SONAR is based ?

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  20. State the use of echo in medical field.

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