On a camping trip, your friend tells you that fluffing up a down sleeping bag before you go to bed will keep you warmer than sleeping in the same bag when it is still crushed from being in its storage sack. Explain why this happens.(hint: a large amount of air is presnt in an uncrushed sleeping bag)
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On a camping trip, your friend tells you that fluffing up a down sleeping bag before you go to bed w...
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