# Physics

A Blowhard Tests of lung capacity show that adults are able to exhale 1.5 liters of air through their mouths in as little as 1.0 second.

A. If a person blows air at this rate through a drinking straw with a diameter of 0.49cm , what is the speed of air in the straw?

v = ___ m/s?

B. If the air from the straw in part A is directed horizontally across the upper end of a second straw that is vertical to what height does water rise in the vertical straw?

h = ____ m?

1. 👍 0
2. 👎 0
3. 👁 966
1. (1500cm^3)/(1.0s) / (pi*(.49/2)^2 cm^2) = 7954 cm/s or 7.9 m/s

not sure on B.

1. 👍 0
2. 👎 1

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