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Q.

Decibel (dB) is a relative unit of measurement to estimate

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a

thickness of ozone in air

b

amount of pesticides

c

dissolved oxygen in water

d

intensity of sound

answer is C.

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Detailed Solution

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Decibel (dB) is a relative unit of measurement widely used in acoustics (the science concerned with the production, control, transmission, reception, and effects of sound). 150 dB or more generated by take off of a jet plane or rocket, may damage eardrums thus permanently impairing hearing ability.

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