For a Person at Rest, the Velocity V (In Liters $\pi$

question 251

Multiple Choice

For a person at rest, the velocity v (in liters per second) of airflow during a respiratory cycle (the time from the beginning of one breath to the beginning of the next) is given by $\pi$ $v = 0.85 \sin \left( \frac { \pi t } { 3 } \right)$ ,

Where t is the time (in seconds) .
(Inhalation occurs when v > 0, and exhalation occurs when v < 0.)

Find the time for one full respiratory cycle.

• A)7 sec
• B)9 sec
• C)3 sec
• D)8 sec
• E)6 sec

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