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6.

How many times more intense is the sound of a motorcycle (90 dB) passing by than an automobile (70 dB) passing by?
four times.
ten times
one hundred times
twenty times

6. How many times more intense is the sound of a motorcycle (90 dB) passing by than-example-1
User MaZZZu
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1 Answer

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The difference in sound intensity between a motorcycle (90 dB) and an automobile (70 dB) passing by is 20 dB.

Using the formula for sound intensity in decibels, where a change of 10 dB represents a tenfold change in sound intensity:

20 dB = 10^(20/10)

20 dB is therefore 100 times more intense than 0 dB (the threshold of human hearing).

So the sound of a motorcycle passing by (90 dB) is 100 times more intense than the sound of an automobile passing by (70 dB).

Therefore, the answer is: one hundred times.
User Drew Nichols
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