Water pressure increases as depth increases. At the surface of a swimming pool, where pressure is 101325 Pa, a spherical beach ball has a radius of 0.3 m. Suppose the ball is pushed under water to a depth where the pressure is 140525 Pa. Calculate the change in volume of the beach ball at that depth? The ball is filled with air. You may need the following information: Density of air: 1.225 kg/m³ Density of water: 1000 kg/m3 Bulk modulus of air: 1.4 x 105 N/m² Bulk modulus of water: 2.1 × 10° N /m²
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.
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