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Give scientific reasons Why cannot we h...

Give scientific reasons
Why cannot we hear the echo produced in a classroom?

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TARGET PUBLICATION-STUDY OF SOUND-EXERCISE
  1. The speed of sound in air at 0° C is 332 mis. IF it increases at the r...

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  2. A sound wave of wavelength 3 cm travels with a speed of 336 ms. Calcul...

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  3. Sunita saw the firecrackers and after 5 seconds, heard its bursting. A...

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  4. Calculate the distance travelled by a sound wave having frequency 350 ...

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  5. Helium gas is filled in two identical bottles A and B. The mass of the...

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  6. Hydrogen gas is filled in two identical bottles, A and B, at the same ...

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  7. How does the frequency velocity of sound depend on its frequency?

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  8. How is the direction of the oscillation of the particles of the medium...

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  9. How are the frequencies of notes sa, re, ga, ma, pa, dha, ni related t...

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  10. What is the main difference between the frequencies of the voice of a ...

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  11. Choose the correct alternative The amplitude of sound Wave determines...

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  12. Choose the correct alternative A man should use Materials to reduce ...

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  13. Answer the following State true or false. If false, write the correct...

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  14. Answer the following Name the following. The part of ear which has f...

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  15. Answer the following Find odd one out. Pinna, Eardrum, Tympanic cavi...

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  16. Give scientific reasons Why cannot we hear the echo produced in a cla...

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  17. Answer the following. What is compression and rarefaction?

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  18. Answer the following. A-sound wave of wavelength 0.25 mand frequency ...

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  19. Answer the following Derive an expression for speed of sound.

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  20. Answer the following. Complete the following table

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