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According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?
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Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%
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Consider a standard deck of 52 cards. You pick two cards in a row, without returning the first card...
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