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What is the range of atomic numbers of elements that don't exist naturally on earth?
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The sound level near a noisy air conditioner is 70 db. if two such units operate side by side, the sound level near the, would bea. 70dbb. 73 dbc. 105 dbd 140 db
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What energy transformations occur each time the skateboarder rolls up the ramp?
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What is the range of atomic numbers of elements that don't exist naturally on earth?...
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