What is Absolute Pressure and How is it Related to Gauge Pressure in a Pool?

Thread starter NP04
Start date Jul 10, 2019
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Absolute Pressure

In summary, absolute pressure in a pool refers to the total pressure exerted on an object or surface, taking into account both atmospheric pressure and the weight of the water. It is typically measured using a pressure gauge or sensor, and can be affected by factors such as pool depth, water temperature, and altitude. This differs from gauge pressure, which only measures the water weight. It is important to monitor absolute pressure in a pool for safety and maintenance purposes.

Jul 10, 2019

NP04

Homework Statement: You are originally 2.0m below the surface of a pool.

If you swim to 4.0m below the surface, what will happen to the absolute pressure on you?

a) Absolute Pressure Quadruples
b) Absolute Pressure More than doubles
c) Absolute Pressure exactly doubles
d) Absolute Pressure less than doubles

Relevant Equations: P gauge = ρgh
P total = P atm + P gauge

I think I can eliminate A because the equations depict a linear relationship. Since the gauge pressure is in a linear relationship with the absolute pressure, I would say exactly 2, but the answer is d.

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Jul 10, 2019

Orodruin

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Is the surface pressure zero?

Jul 10, 2019

jackwhirl

How would you define absolute pressure? (In your own words.)

Related to What is Absolute Pressure and How is it Related to Gauge Pressure in a Pool?

What is absolute pressure in a pool?

Absolute pressure in a pool refers to the total pressure exerted by the weight of the water and the surrounding air on a specific point in the pool. It takes into account the atmospheric pressure as well as the hydrostatic pressure of the water.

How is absolute pressure different from gauge pressure in a pool?

Gauge pressure only takes into account the pressure exerted by the water and does not consider the atmospheric pressure. Absolute pressure, on the other hand, includes both the water pressure and atmospheric pressure.

Why is it important to measure absolute pressure in a pool?

Measuring absolute pressure in a pool is important for various reasons. It helps to ensure the safety of swimmers by determining the maximum depth that can be safely reached, and it also affects the performance of pool equipment such as filters and pumps.

How is absolute pressure measured in a pool?

Absolute pressure can be measured using a pressure gauge or sensor. The gauge is typically connected to a pipe or hose that extends into the pool and measures the pressure at a specific point. Sensors can also be used to continuously monitor the pressure and provide more accurate readings.

What factors can affect the absolute pressure in a pool?

The two main factors that can affect absolute pressure in a pool are temperature and depth. As the water temperature increases, the pressure also increases due to the expansion of the water molecules. Depth also plays a role as the pressure increases with depth due to the weight of the water above. Other factors such as air temperature and altitude can also impact the absolute pressure in a pool.