Why is it impossible while 5m or more below water to breathe through a hose connected to the surface air, but easy to breathe through a scuba?
In: 158
When you breathe in, you’re not actively sucking in air. You are letting air be pushed into your lungs by the surrounding air pressure by relaxing your diaphragm. Incidentally this is also why you can blow air harder than you can suck air in.
When you are underwater, the surrounding water pushes on your chest to the point you cannot take in air. Scuba gear is designed to pressurize the air, forcing it into your chest against the water pressure.
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