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PHYSICS

Physics
Instrument used to study the behaviour of a vibrating string is :

Hygrometer
Hydrometer
Sonometer
Barometer

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Physics
Among the following materials sound travels fastest in

Vacuum
Air
Water
Steel

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Physics
Sound becomes hazardous noise pollution at decibels?

Above 50 db
Above 30 db
Above 80 db
Above 120 db

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Physics
What is the SI unit of intensity of sound?

Tesla
Decibel
Newton
Heartz

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Physics
Sound cannot pass through

Steel
Water
Air
Vacuum

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