the smallest audible sound is zero decibels. a sound of 90 decibels is _____ times more powerful than that of zero decibels.
a) 10 to the power of 9
b)90
c)900
d)10 to the power of 90
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Explanation:
➡️ The scale for measuring intensity is the decibel scale. The threshold of hearing is assigned a sound level of 0 decibels (abbreviated 0 dB); this sound corresponds to an intensity of 1*10-12 W/m2. A sound that is 10 times more intense ( 1*10-11 W/m2) is assigned a sound level of 10 dB.
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