Pascal (unit)

Pascal (unit)

The Pascal (symbol: Pa) is the SI unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. It is defined as one newton per square metre (N/m²). It is named after the French polymath Blaise Pascal.

Definition

The pascal is defined as the SI unit of pressure, equal to one newton per square metre. This definition can be mathematically expressed as:

1 Pa = 1 N/m²

where:

• N is the newton,
• m² is the square metre.

Medical applications

In medicine, the pascal unit is used in various contexts. For instance, it is used in the measurement of blood pressure, which is typically recorded in millimeters of mercury (mmHg) but can be converted to pascals using the conversion factor of 133.322 pascals per mmHg.

The pascal is also used in the field of biomechanics to measure the stiffness or compliance of biological tissues, often in the context of Young's modulus, a measure of the stiffness of an elastic material.

See also

• Pressure
• SI unit
• Blaise Pascal
• Newton (unit)
• Metre
• Blood pressure
• Biomechanics
• Young's modulus

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