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What is the least time interval required...

What is the least time interval required to hear a distinct echo?

A

0.3 s

B

0.1 s

C

0.5 s

D

20 s

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MODERN PUBLICATION-SOUND-EXERCISE
  1. Which of the following help in the communication between two astronatu...

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  2. A marine survey ship sends a sound wave straight to the sea bed. It de...

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  3. What is the least time interval required to hear a distinct echo?

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  4. Which of the following statements about sound waves is correct?

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  5. The regions of compressions and rarefractions of sound wave are establ...

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  6. Identify the longitudinal waves from the following.

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  7. A wave source produces 10 oscillations in 100 ms . Find the time perio...

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  8. What does a wave transfer?

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  9. Differentiate between crest and trough.

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  10. Why are cannot hear an echo in a small room?

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  11. Mention the types of mechanical waves. Identify the type which can be ...

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  12. Draw graph for a wave representing wave disturbances and time for a so...

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  13. When does the ear drum of human ear vibrate?

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  14. List three points which an engineer should use while designing an audi...

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  15. A man fires a rifle in front of a cliff and hears the echo after 3 sec...

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  16. Waves of special frequencies are used for cleaning hard to reach place...

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  17. Waves of special frequencies are used for cleaning hard to reach place...

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  18. Waves of special frequencies are used for cleaning hard to reach place...

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  19. In SONAR, we use

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  20. When we change feeble sound to loud we increase its

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