You asked: Why do scuba divers need to exhale when they ascend to the surface?

Why must divers exhale while ascending?

Why Must Divers Exhale While Ascending? A diver holding their breath during an ascent risks air not escaping naturally. Air volume in their lung expands due to less pressure at shallower depths. Air has to escape and the diver’s lung is forced to break.

Why do scuba divers need to exhale air when they ascend to the surface of the water apply Boyle’s Law in discussing your answer?

Its volume expands or contracts with even a few feet of depth change, so Boyle’s Law means it’s important to breathe in and out without trying to save tank air by breath-holding. It’s vital to release compressed air while ascending to prevent lung damage.

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Why do scuba divers need to exhale air when they ascend to the surface of the water quizlet?

Why do scuba divers need to exhale air when they ascend to the surface of the water? As a diver ascends to the surface, external pressure decreases. If the air in the lungs were not exhaled, its volume would expand and severely damage the lungs. The pressure in the lungs must adjust to changes in the external pressure.

What happens if scuba divers hold their breath while making emergency ascents to the surface from depths of 30 meters or more?

If you hold your breath during your ascent, your lungs will over expand and an alveolar rupture will occur. An alveolar rupture can lead to a pneumothorax, which is air in the pleural space (which is the space around your lungs) and can lead to a collapsed lung.

How do you ascend scuba diving?

HOW TO ASCEND IN SCUBA DIVING

  1. LOOK UP. Look up and watch for boats above. …
  2. LISTEN FOR BOATS. Listen for boats and motors that may be above you. …
  3. INFLATE A SURFACE MARKER. …
  4. MAKE A SAFETY STOP. …
  5. SLOWLY KICK AND SWIM UP. …
  6. DEFLATE AIR FROM BCD TO STOP IT EXPANDING. …
  7. WATCH YOUR ASCENT RATE. …
  8. PROTECT YOUR HEAD WITH YOUR RIGHT ARM.

Why does a scuba tank need to be pressurized?

Why does a scuba diver need increased gas pressure in the air tank? Because the deeper the diver descends the more pressure that is applied to the body, the increase allows for divers to breathe under these extreme pressures.

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Why a scuba diver needs a diving tank while he is underwater?

A scuba diver needs a diving tank in order to provide breathing gas while he is underwater.

Why is it impossible to breathe air through an extra-long snorkel longer than a couple of meters while swimming under water?

Why is it impossible to breathe air through an extra-long snorkel (longer than a couple of meters) while swimming under water? … This is more than the muscles of the chest cavity can overcome-the chest cavity and lungs are compressed, resulting in an air pressure within them of more than 1 atm.

Why is it impossible to breathe air through an extra-long snorkel while swimming under water?

When we breathe, we expand the volume of our chest cavity, reducing the pressure on the outer surface of the lungs to less than 1 atm (Boyles law). … Extra-long snorkels do not work because of the pressure exerted by water at an increased depth.

Why is Boyle’s law important to a scuba diver who is ascending?

Boyle’s Law is also important to divers because it means that if a diver takes a lung- ful of air while he is underwater, that air will expand in his lungs as he rises to the surface. If he holds his breath, or ascends too rapidly (like a cork) the expanding air can rupture his lungs.