Physlib.Units.WithDim.Pressure

The type `DimPressure` represents physical pressure as a dimensionful quantity. It is defined with the physical dimension $M L^{-1} T^{-2}$ (mass per unit length per unit time squared) over the real numbers $\mathbb{R}$. A value in `DimPressure` is a function that assigns a real number to a choice of units such that the value scales consistently according to the dimension $M L^{-1} T^{-2}$.

The constant $1 \text{ Pa}$ (pascal) is the dimensionful pressure defined as the quantity that takes the value $1$ when evaluated in the International System of Units (SI). As an element of `DimPressure`, it represents a physical quantity with the dimension $M L^{-1} T^{-2}$ (mass per unit length per unit time squared).

The physical constant representing $1 \text{ millimeter of mercury (mmHg)}$ is defined as the dimensionful pressure (of type `DimPressure`) whose value in the International System of Units (SI) is $133.322387415 \text{ Pa}$.

The pressure $1 \text{ bar}$ is defined as a dimensionful quantity in $\text{DimPressure}$ (with physical dimensions $M L^{-1} T^{-2}$) that corresponds to a value of $100,000$ pascals ($\text{Pa}$) when measured in the International System of Units ($\text{SI}$).

The dimensionful constant `standardAtmosphere` is defined as the physical pressure equivalent to $101,325$ units in the International System of Units (SI). Since the SI unit of pressure is the Pascal ($\text{Pa}$), this corresponds to $101,325 \text{ Pa}$. Mathematically, it is the element of `DimPressure` (with dimensions $M L^{-1} T^{-2}$) that, when evaluated in the SI unit system, yields the value $101,325$.

The dimensionful constant `torr` represents the physical pressure of $1 \text{ torr}$. It is defined as exactly $\frac{1}{760}$ of a standard atmosphere ($\text{standardAtmosphere}$), which is an element of the type `DimPressure` with physical dimensions $M L^{-1} T^{-2}$.

The definition `DimPressure.psi` represents the physical pressure of 1 pound per square inch ($1 \text{ psi}$). It is defined as the dimensionful quantity of type `DimPressure` that takes the value $1$ in a unit system where the unit of mass is pounds and the unit of length is inches, with all other base units (such as time in seconds) following the International System of Units (SI).