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Pressure Formula

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Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Check FAQs

P' = \frac{1}{3} \cdot ρ gas \cdot {V rms}^{2}

P' - Pressure?ρ_gas - Density of Gas?V_rms - Root Mean Square Velocity?

Pressure Example

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Here is how the Pressure equation looks like with Values.

Here is how the Pressure equation looks like with Units.

Here is how the Pressure equation looks like.

36750 = \frac{1}{3} \cdot 1.225 \cdot 300^{2}

36750Pa = \frac{1}{3} \cdot 1.225kg/m³ \cdot {300m/s}^{2}

36750 = \frac{1}{3} \cdot 1.225 \cdot 300^{2}

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Pressure Solution

Follow our step by step solution on how to calculate Pressure?

FIRST Step Consider the formula

P' = \frac{1}{3} \cdot ρ gas \cdot {V rms}^{2}

Next Step Substitute values of Variables

∴

P' = \frac{1}{3} \cdot 1.225kg/m³ \cdot {300m/s}^{2}

Next Step Prepare to Evaluate

∴

P' = \frac{1}{3} \cdot 1.225 \cdot 300^{2}

LAST Step Evaluate

∴

P' = 36750Pa

Pressure Formula Elements

Variables

Pressure

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Symbol: P'

Measurement: PressureUnit: Pa

Note: Value can be positive or negative.

Formulas to find Pressure

Density of Gas

The Density of Gas is defined as mass per unit volume of a gas under specific conditions of temperature and pressure.

Symbol: ρ_gas

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Density of Gas

Root Mean Square Velocity

The Root Mean Square Velocity is the square root of the average of the square of the velocity. As such, it has units of velocity.

Symbol: V_rms

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Root Mean Square Velocity

Other formulas in Pressure Relations category

Go Absolute Pressure

P abs = P atm + P v

Go Density

P = \frac{m}{V}

Go Specific Gravity

S 1 = \frac{ρ s}{ρ water}

Go Specific Entropy

G s = \frac{S}{m}

How to Evaluate Pressure?

Pressure evaluator uses Pressure = 1/3*Density of Gas*Root Mean Square Velocity^2 to evaluate the Pressure, Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Pressure is denoted by P' symbol.

How to evaluate Pressure using this online evaluator? To use this online evaluator for Pressure, enter Density of Gas (ρ_gas) & Root Mean Square Velocity (V_rms) and hit the calculate button.

FAQs on Pressure

What is the formula to find Pressure?

The formula of Pressure is expressed as Pressure = 1/3*Density of Gas*Root Mean Square Velocity^2. Here is an example- 36750 = 1/3*1.225*300^2.

How to calculate Pressure?

With Density of Gas (ρ_gas) & Root Mean Square Velocity (V_rms) we can find Pressure using the formula - Pressure = 1/3*Density of Gas*Root Mean Square Velocity^2.

Can the Pressure be negative?

Yes, the Pressure, measured in Pressure can be negative.

Which unit is used to measure Pressure?

Pressure is usually measured using the Pascal[Pa] for Pressure. Kilopascal[Pa], Bar[Pa], Pound Per Square Inch[Pa] are the few other units in which Pressure can be measured.

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