Pascal Converter
Convert Pascal to Standard Atmosphere and more • 57 conversions
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Unit Explanations
PascalPa
Source UnitThe pascal (Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. It is defined as one newton per square meter. In other words, it is the pressure exerted by a force of one newton acting uniformly over an area of one square meter. The pascal is a crucial unit in engineering, physics, and meteorology, providing a standard measure for atmospheric pressure, material strength, and force distribution. It allows for consistent and comparable measurements across various scientific and industrial fields.
Current Use
The pascal is widely used in various fields to measure pressure and stress. In meteorology, it is used to express atmospheric pressure, often in the form of hectopascals (hPa). In engineering, it helps evaluate the strength of materials and structures. The unit is also crucial in fluid mechanics, where it is used to determine fluid pressure in pipes and vessels. The pascal's versatility makes it a fundamental unit in both scientific research and practical applications, especially where precise pressure measurements are critical.
Fun Fact
The pascal is named after Blaise Pascal, who made significant contributions to the understanding of fluid pressure.
Standard Atmosphereatm
Target UnitThe standard atmosphere (atm) is a unit of pressure defined as precisely 101,325 pascals (Pa). It is commonly used to represent atmospheric pressure at sea level and is a crucial reference point in various scientific disciplines. This unit is derived from the average atmospheric pressure on Earth at sea level, which influences weather patterns, flight conditions, and various engineering applications. The standard atmosphere is also equivalent to 1013.25 hPa (hectopascals) or 760 mmHg (millimeters of mercury), enabling its use across different scientific fields.
Current Use
The standard atmosphere is extensively used in various fields including meteorology, aviation, and engineering. It serves as a reference for calculating altitudes, calibrating instruments, and understanding atmospheric conditions. In aviation, for instance, it is crucial for determining aircraft performance at different altitudes. The unit is also employed in the design of pressure-sensitive equipment and in the calibration of pressure gauges across laboratories and industrial settings.
Fun Fact
The standard atmosphere is defined as equivalent to the pressure exerted by a 760 mm column of mercury.
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= × 1.00000How to Convert
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Pascal
pressure • SI Unit
Definition
The pascal (Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus, and ultimate tensile strength. It is defined as one newton per square meter. In other words, it is the pressure exerted by a force of one newton acting uniformly over an area of one square meter. The pascal is a crucial unit in engineering, physics, and meteorology, providing a standard measure for atmospheric pressure, material strength, and force distribution. It allows for consistent and comparable measurements across various scientific and industrial fields.
History & Origin
The pascal was named in honor of Blaise Pascal, a French mathematician, physicist, and inventor known for his contributions to fluid mechanics and the study of pressure. The unit was officially adopted as the SI unit for pressure in 1971, although the concept of pressure itself dates back to early scientific studies of fluids and gases. The pascal provided a standardized way to measure pressure, replacing a variety of non-standard units previously in use across different regions and industries.
Etymology: The term 'pascal' is derived from the name of Blaise Pascal.
Current Use
The pascal is widely used in various fields to measure pressure and stress. In meteorology, it is used to express atmospheric pressure, often in the form of hectopascals (hPa). In engineering, it helps evaluate the strength of materials and structures. The unit is also crucial in fluid mechanics, where it is used to determine fluid pressure in pipes and vessels. The pascal's versatility makes it a fundamental unit in both scientific research and practical applications, especially where precise pressure measurements are critical.
💡 Fun Facts
- •The pascal is named after Blaise Pascal, who made significant contributions to the understanding of fluid pressure.
- •One pascal is a very small pressure; it is equivalent to the pressure of a dollar bill lying flat on a table.
- •The human eardrum can detect pressure changes as small as 20 micropascals.
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Standard Atmosphere
pressure • Non-SI
Definition
The standard atmosphere (atm) is a unit of pressure defined as precisely 101,325 pascals (Pa). It is commonly used to represent atmospheric pressure at sea level and is a crucial reference point in various scientific disciplines. This unit is derived from the average atmospheric pressure on Earth at sea level, which influences weather patterns, flight conditions, and various engineering applications. The standard atmosphere is also equivalent to 1013.25 hPa (hectopascals) or 760 mmHg (millimeters of mercury), enabling its use across different scientific fields.
History & Origin
The concept of atmospheric pressure was first recognized in the 17th century when scientists like Galileo and Torricelli explored the behavior of gases. Torricelli's experiments with mercury led to the invention of the barometer, which provided the first means of measuring atmospheric pressure. The term 'standard atmosphere' was formalized in the 1950s as a reference point for various scientific calculations and applications, based on the average conditions observed on Earth.
Etymology: The word 'atmosphere' derives from the Greek words 'atmos' meaning 'vapor' and 'sphaira' meaning 'sphere', reflecting the gaseous envelope surrounding the Earth.
Current Use
The standard atmosphere is extensively used in various fields including meteorology, aviation, and engineering. It serves as a reference for calculating altitudes, calibrating instruments, and understanding atmospheric conditions. In aviation, for instance, it is crucial for determining aircraft performance at different altitudes. The unit is also employed in the design of pressure-sensitive equipment and in the calibration of pressure gauges across laboratories and industrial settings.
💡 Fun Facts
- •The standard atmosphere is defined as equivalent to the pressure exerted by a 760 mm column of mercury.
- •1 atm is approximately equal to 14.7 pounds per square inch (psi), commonly used in tire pressure measurements.
- •The concept of standard atmosphere is also related to the ideal gas law, which describes the behavior of gases under various conditions.
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