# Velocity of the pressure change

• losbellos
In summary, the conversation discusses the calculation of pressure re-balancing time in an underwater container. The method involves removing a small amount of liquid to create a normal enclosed liquid pressure, and then using a door to re-pressurize. The pressure wave's propagation speed and the time required for equilibrium are also mentioned.
losbellos
Hej guys,

Do you know how to calculate the pressure re balancing time in an underwater container where the liquid were de -pressured by taking very small amount of liquid away (just to have the normal enclosed liquid's gravitational pressure there, without the external water column's pressure). Opening a door would be the method for the re-pressurizing. So calculate instantaneous the water displacement and only the time requires to the pressure wave to balance the pressure needed...

Thank you very much!

Pressure changes usually propagate with the speed of sound in the medium. Reaching a good equilibrium can need longer in the same way as sound waves can bounce around in a room multiple times.

losbellos

## What is the velocity of the pressure change?

The velocity of the pressure change is the rate at which the pressure of a substance or object changes over time. It is typically measured in units of pressure per unit of time, such as pounds per square inch per second.

## How is the velocity of the pressure change calculated?

The velocity of the pressure change can be calculated using the formula v = ∆P/∆t, where v is the velocity, ∆P is the change in pressure, and ∆t is the change in time. This formula is derived from Newton's second law of motion, which states that force is equal to mass times acceleration.

## What factors affect the velocity of the pressure change?

The velocity of the pressure change can be affected by several factors, including the amount of force applied to the substance or object, the density of the substance or object, and the temperature of the substance or object. In general, a greater force or higher density will result in a higher velocity of pressure change, while a higher temperature may decrease the velocity.

## Why is the velocity of the pressure change important?

The velocity of the pressure change is important in many scientific fields, such as fluid mechanics, aerodynamics, and meteorology. It helps us understand how pressure changes affect the behavior of substances and objects, and can be used to predict and control the movement of fluids and gases.

## How is the velocity of the pressure change measured?

The velocity of the pressure change can be measured using various instruments, depending on the specific application. For example, in meteorology, it can be measured using barometers or anemometers, while in fluid mechanics, it can be measured using manometers or pitot tubes. These instruments provide quantitative data on the pressure change, which can then be used to calculate the velocity.

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