When taking a breath, air moves down a person's windpipe (bronchus), which has a O 1. 999 Pa certain diameter, until it meets a constric tion point where the cross-sectional area de- creases by half. The average speed of air mov- O 2. 749 Pa ing through the wide part of the windpipe is known to have a value of 20.2 cm/s. Treating air as an incompressible fluid and 3. 0.0999 Pa that the air does not change height as it trav- els through the constriction in the windpipe, calculate the value of the change in pressure O 4. 0.375 Pa that the air experiences. The density of air is 1.224 kg/m'. 5. 0.0749 Pa O 6. 250 Pa O 7. 0.025 Pa O 8. 0 Pa