PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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36. Multiple choice question XXXVI

1. A key of mechanical piano is first struck gently and then struck again but much harder this time. What kind of change in sound will you observe in the second case:

Sound will be louder but the pitch will not be different
Sound will be louder and the pitch will also be higher
Sound will be louder but the pitch will be lower
Both loudness and pitch will remain unaffected

2. Before the main shock waves, the earthquake produces the characteristic sound waves which some animals like rhinoceros can hear. Can you guess the kind of sound waves produced here?

Infrasonic sounds
Ultrasonic sounds
Audible Sounds
None of these

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