Problem: Explain why scuba divers should never hold their breath when they ascend to the surface.For every _____ m of depth a diver descends in water, she experiences an additional 1 atm of pressure due to the weight of the water above her. The pressure regulator used in scuba diving delivers air at a pressure that matches the ______ pressure; otherwise, the diver could not inhale the air. For example, when a diver is at a depth of  ____ below the surface, the regulator delivers air at a pressure of 3 atm to match the 3 atm of pressure around the diver (1 atm due to normal atmospheric pressure and 2 additional atmospheres due to the weight of the water at 20 m). Suppose a diver inhaled a lungful of air at a pressure of 3 atm and swam quickly to the surface (where the pressure drops to ____ atm) while holding her breath. What would happen to the volume of air in the lungs of the diver? Because the pressure ______ by a factor of three, the volume of the air in the lungs of the diver would increase by a factor of three, severely damaging her lungs and possibly killing her.Answer choices: 10external2internal2040130increasesdecreases

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We are asked to explain why scuba divers should never hold their breath when they ascend to the surface.

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Explain why scuba divers should never hold their breath when they ascend to the surface.

For every _____ m of depth a diver descends in water, she experiences an additional 1 atm of pressure due to the weight of the water above her. The pressure regulator used in scuba diving delivers air at a pressure that matches the ______ pressure; otherwise, the diver could not inhale the air. For example, when a diver is at a depth of  ____ below the surface, the regulator delivers air at a pressure of 3 atm to match the 3 atm of pressure around the diver (1 atm due to normal atmospheric pressure and 2 additional atmospheres due to the weight of the water at 20 m). Suppose a diver inhaled a lungful of air at a pressure of 3 atm and swam quickly to the surface (where the pressure drops to ____ atm) while holding her breath. What would happen to the volume of air in the lungs of the diver? Because the pressure ______ by a factor of three, the volume of the air in the lungs of the diver would increase by a factor of three, severely damaging her lungs and possibly killing her.

10

external

2

internal

20

40

1

30

increases

decreases