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Free gk questions Online Test - MeritNotes
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1. What are the harmful effects of noise pollution?
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2. Give the names of any two wind instruments?
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3. What is the velocity of sound in air, water and iron?
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4. How is sound produced?
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5. Define period of oscillation?
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6. Give the names of any two percussion instruments?
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7. What is noise?
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8. Define amplitude of vibration?
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9. What are the frequency ranges of audible and inaudible sounds?
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10. What are the different types of media through which sound travels?
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