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NCERT BANGLISH-SOUND-Think and Discuss
- Do compressions and rarefactions in sound wave travel in same directio...
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- Does the frequency of sound waves depend on the medium in which it tra...
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- The frequency of source of sound is 10Hz. How many times does it vibra...
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- Gently strike a hanging bell (temple bell) and try to listen to the so...
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- During a thunderstorm if you notice a 3 second delay between the flash...
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- Two girls are playing on identical stringed instruments. The strings o...
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- What change would you expect in the characteristic of a musical sound ...
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- What could be the reason for better reflection of sound by rough surfa...
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- Why is an echo weaker than the original sound ?
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- In a closed box if you say hello, the sound heard will be Hellooooo….....
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- What is the advantage of having conical openings in Horns, megaphones ...
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- Why do we put cushions on the chairs, carpet on the floor, straw mater...
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