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Title: The sound of 40 decibels is Post by: ppk on Mar 19, 2012 The sound of 40 decibels is
A) twice as intense as the sound of 20 decibels. B) four times as intense as the sound of 20 decibels. C) 10 times as intense as the sound of 20 decibels. D) 100 times as intense as the sound of 20 decibels. E) 1000 times as intense as the sound of 20 decibels. Title: Re: The sound of 40 decibels is Post by: bio_man on Mar 21, 2012 Content hidden
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