The absolute pressure in a tank is 85 kPa and the local ambient absolute pressure is 97 kPa. If

step 1 So in this problem to find what the column height difference will show, we're going to start by

The absolute pressure in a tank is 85 kPa and the local...

The absolute pressure in a tank is $85 \mathrm{kPa}$ and the local ambient absolute pressure is 97 kPa. If a Utube with mercury (density $=13550 \mathrm{kg} / \mathrm{m}^{3}$ ) is attached to the tank to measure the vacuum, what column height difference would it show?

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Key Concepts

Pressure Differential

This concept involves determining the difference between two pressure values, typically an ambient pressure and a system pressure, to evaluate the net pressure acting on a system. It is the driving factor behind measuring changes or differences in fluid column heights and is fundamental when assessing vacuum or overpressure conditions.

Hydrostatic Pressure

Hydrostatic pressure refers to the pressure generated by a fluid at rest due to the gravitational force acting on it. It is calculated by the relationship involving the fluid’s density, gravitational acceleration, and the height of the fluid column. This concept is critical in relating pressure differences to measurable height differences in manometric systems.

Manometer

A manometer is an instrument that utilizes a column of fluid to measure pressure differences based on the principles of hydrostatic pressure. In practical applications, such as determining a vacuum or pressure in a system, a U-tube manometer displays a height difference in the fluid that directly corresponds to the pressure differential.

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