1. People who have traveled by air are familiar with the safety instructions given by the crew…

1. People who have traveled by air are familiar with the
safety instructions given by the crew before flight. Instructions are included
on how to use the O masks. When and why are these masks needed?

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2. It is often necessary to measure and record changes in
airflow as a patient breathes. How can we apply the formula for resistance to
measure and record airflow?

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