The results are shown in the following table: Breaths per minute 20 38 Volume of air per breath 450 cm 1 000 cm At rest After running Explain why the amount of air taken up into the lungs increases after exercise

a. they are both space stations

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the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

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explanation:

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