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How easy is it to breathe through a straw? When you breathe deeply, you pull in...

How easy is it to breathe through a straw? When you breathe deeply, you pull in 4.0 L of air in about 3.0 s. This requires a pressure difference of about 4.0 kPa between the air in your lungs and the outside air. What additional pressure difference is required to pull 20∘C air through a straw that is 22 cmlong and 0.56 cm in diameter?

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