The density of air under standard laboratory conditions is
The density of air under standard laboratory conditions is 1.29{\rm kg}/{\rm m}^{3} , and about 20.0\% of that air consists of oxygen. Typically, people breathe about .5 L of air per breath.How many grams of oxygen does a person breathe in a day?
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on a hot summer day a young girl swings on a rope above the local swimming hole figure 1 when she lets go of the rope
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