What is the total pressure at the level of the diver if he is 1 m beneath the surface? Assume freshwater conditions with density of water 1000 kg/m3 and 1 atm = 101325 Pa. Pressure 1m beneath the surface = ______ Pa
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
Breathing air in and out is dependent on the differences in pressure between the atmosphere and the lungs.
A diver under only three feet of water with a tube connected to the surface can have trouble breathing; any deeper and breathing air at atmospheric pressure is practically impossible.
What is the total pressure at the level of the diver if he is 1 m beneath the surface? Assume freshwater conditions with density of water 1000 kg/m3 and 1 atm = 101325 Pa.
Pressure 1m beneath the surface = ______ Pa
Think: Why is it easier for a scuba diver to breathe compressed air?
Answer:
In order to breathe, the lungs must be able to expand against the pressure that surrounds an individual. If a diver is submerged and attempting to breathe air at atmospheric pressure, his lungs cannot expand against the pressure of the water. However, a scuba diver carries a tank of compressed gas where the pressure of the gas is the same as the surrounding water. This allows air to push into the lungs against the pressure being applied to the diver externally.
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