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A jet aircraft flies at a speed of 410m/...

A jet aircraft flies at a speed of `410m//s`. What is this speed known as?

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The correct Answer is:
Supersonic speed
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LAKHMIR SINGH & MANJIT KAUR-SOUND-Exercise
  1. Name the physical quantity whose SI unit is 'hertz'

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  2. What is the SI unit of frequency?

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  3. A jet aircraft flies at a speed of 410m//s. What is this speed known a...

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  4. A stone is dropped on the surface of water in pond. Name the type of w...

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  5. What is the general name of the waves consisting of: (a) compression...

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  6. State the general name of the waves in which the particles of the medi...

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  7. What type of waves are illustrated by the movement of a rope whose one...

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  8. Which of the following travels slowest in air and which one fastest? ...

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  9. Which term is used to denote a speed greater than the speed of sound?

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  10. A tuning fork has a number 256 marked on it. What does this number sig...

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  11. What is the time-period of a tuning fork whose frequency is 200 Hz?

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  12. Calculate the frequency of a wave whose time-period is 0.02s.

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  13. What will be the change in the wavelength of a sound wave in air if it...

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  14. If 20 waves are produced per second, what is the frequency in hertz?

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  15. What is vaccum? Explain why, sound cannot travel through vaccum?

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  16. Explain the term amplitude of a wave. Draw the diagram of a wave and m...

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  17. A cricket ball is seen to hit the bat first and the sound of hitting i...

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  18. Which of the following terms apply to sound waves in air and which to ...

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  19. (a) Name four ways in which sound can be produced. (b) Calculate the...

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  20. A sound signal of 128 vibrations per second has a wavelength of 2.7m. ...

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