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Why are cannot hear an echo in a small r...

Why are cannot hear an echo in a small room?

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MODERN PUBLICATION-SOUND-EXERCISE
  1. How the bats make use of ultrasonic waves to catch their prey? Explain...

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  2. Calculate the wavelength of a sound wave whose frequency is 220 Hz and...

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

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  4. A wave moves a distance of 8 m in 0.05 s. Find the velocity of the wav...

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  5. A wave moves a distance of 8 m in 0.05 s. What is the wavelength of th...

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  6. State a condition for an echo to be heard.

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  7. Bats cannot see then how do they catch their prey.

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  8. A sound wave travels at a speed of 339 ms^-1. If its wavelength is 1.5...

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  9. How does the sound produced by the vibrating object in a medium reach ...

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  10. State the characteristics of wave motion.

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  11. Give some uses of ultrasound.

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  12. Explain the working of SONAR.

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  13. Describe the human ear.

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  14. What is the wavelength corresponding to a freqency of 200 Hz. Given th...

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  15. Calculate the wavelength of a sound wave whose frequency is 220 Hz and...

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  16. A person clapped his hands near a cliff and heard the echo after 5 s. ...

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  17. Find the frequency of a wave whose time-period is 0.001 second?

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  18. A sound wave creates oscillation in air at a place 1000 times in 100 s...

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  19. A sound wave travels at a speed of 339 ms^-1. If its wavelength is 1.5...

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  20. A bat hears the echo of its squeak after 0.1 s. How far is the obstacl...

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