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Heroes in movies hide beneath water and breathe through a
Chapter 11, Problem 71(choose chapter or problem)
Problem 71PE
Heroes in movies hide beneath water and breathe through a hollow reed (villains never catch on to this trick). In practice, you cannot inhale in this manner if your lungs are more than 60.0 cm below the surface. What is the maximum negative gauge pressure you can create in your lungs on dry land, assuming you can achieve −3.00 cm water pressure with your lungs 60.0 cm below the surface?
Questions & Answers
QUESTION:
Problem 71PE
Heroes in movies hide beneath water and breathe through a hollow reed (villains never catch on to this trick). In practice, you cannot inhale in this manner if your lungs are more than 60.0 cm below the surface. What is the maximum negative gauge pressure you can create in your lungs on dry land, assuming you can achieve −3.00 cm water pressure with your lungs 60.0 cm below the surface?
ANSWER:
Step 1 of 2:
Generally, the pressure is measured as positive physical quantity. But when we are dealing with the pressure under the water surface, we use negative pressure. We can inhale only up to 60.0 cm below the water surface. In the case of dry land, we can able to produce -3.00 cm water negative pressure. We are going to calculate the maximum negative pressure that we can produce with our lungs 60.0 cm below the surface.
The negative pressure above the surface or on dry land
The negative pressure at 60.0 cm below the surface
