Pascal Second Converter
Convert Pascal Second to Pound Foot Hour and more • 56 conversions
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Unit Explanations
Pascal SecondPa·s
Source UnitThe pascal second (Pa·s) is the SI unit for dynamic viscosity, representing the internal friction of fluids. It quantifies the resistance of a fluid to flow when an external force is applied. A fluid with a dynamic viscosity of one pascal second will flow under a shear stress of one pascal at a rate of one meter per second. It is a derived unit, meaning it is defined in terms of the base SI units: kilograms (kg), meters (m), and seconds (s). The pascal second is critical in fluid dynamics, engineering, and various scientific disciplines where fluid behavior is studied.
Current Use
Today, the pascal second is widely used in various industries including chemical engineering, food processing, and materials science to characterize the flow properties of fluids. It is essential in applications involving lubrication, mixing, and fluid transport where understanding viscosity is crucial for efficiency and safety.
Fun Fact
The pascal second is named after Blaise Pascal, who also has the unit of pressure named after him.
Pound Foot Hourlf·h
Target UnitThe pound foot hour (lf·h) is a unit of power that quantifies the rate at which work is performed. Specifically, it represents the amount of work done when a force of one pound acts over a distance of one foot in one hour. As a non-SI unit, it is primarily used in certain engineering and mechanical contexts. The calculation involves the work-energy principle, where power is the work done divided by the time taken. Thus, 1 lf·h is equivalent to 0.00181 horsepower. This definition highlights the significance of both work and time in determining power output.
Current Use
The pound foot hour is commonly used in fields such as mechanical engineering, automotive engineering, and various industrial applications where power output needs to be quantified in imperial units. Although less prevalent than SI units, it remains relevant in the US, particularly in the context of machinery and equipment specifications. Its use in automotive power ratings and in some engineering calculations highlights its importance in practical applications.
Fun Fact
The pound foot hour is closely related to the imperial measurement system, which is still widely used in the United States.
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📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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Pascal Second
viscosity • Non-SI
Definition
The pascal second (Pa·s) is the SI unit for dynamic viscosity, representing the internal friction of fluids. It quantifies the resistance of a fluid to flow when an external force is applied. A fluid with a dynamic viscosity of one pascal second will flow under a shear stress of one pascal at a rate of one meter per second. It is a derived unit, meaning it is defined in terms of the base SI units: kilograms (kg), meters (m), and seconds (s). The pascal second is critical in fluid dynamics, engineering, and various scientific disciplines where fluid behavior is studied.
History & Origin
The pascal second was introduced as part of the metric system in the late 20th century, named after Blaise Pascal, a French mathematician and physicist known for his contributions to fluid mechanics and pressure. The unit was formalized in 1971 during the 14th General Conference on Weights and Measures, which aimed to standardize units for scientific accuracy and international communication.
Etymology: The term 'pascal' is derived from the name of Blaise Pascal, while 'second' refers to the time unit in the SI system.
Current Use
Today, the pascal second is widely used in various industries including chemical engineering, food processing, and materials science to characterize the flow properties of fluids. It is essential in applications involving lubrication, mixing, and fluid transport where understanding viscosity is crucial for efficiency and safety.
💡 Fun Facts
- •The pascal second is named after Blaise Pascal, who also has the unit of pressure named after him.
- •Dynamic viscosity can change with temperature; for example, heating honey makes it flow more easily.
- •The viscosity of air is significantly lower than that of most liquids, making it easier for objects to move through it.
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Pound Foot Hour
power • Non-SI
Definition
The pound foot hour (lf·h) is a unit of power that quantifies the rate at which work is performed. Specifically, it represents the amount of work done when a force of one pound acts over a distance of one foot in one hour. As a non-SI unit, it is primarily used in certain engineering and mechanical contexts. The calculation involves the work-energy principle, where power is the work done divided by the time taken. Thus, 1 lf·h is equivalent to 0.00181 horsepower. This definition highlights the significance of both work and time in determining power output.
History & Origin
The pound foot hour emerged from the imperial system of measurement used in the United States and the UK, evolving from older systems that used pounds and feet to quantify work and energy. Its use is primarily associated with mechanical and engineering applications, particularly in the context of rotating machinery and engines where power output is crucial. The necessity to quantify power in familiar terms led to the adoption of the pound foot hour as a practical unit.
Etymology: The term 'pound' derives from the Latin 'libra', which refers to a weight measure, and 'foot' comes from the Old English 'fōt', indicating a length measure. 'Hour' is derived from the Latin 'hora', which signifies a unit of time.
Current Use
The pound foot hour is commonly used in fields such as mechanical engineering, automotive engineering, and various industrial applications where power output needs to be quantified in imperial units. Although less prevalent than SI units, it remains relevant in the US, particularly in the context of machinery and equipment specifications. Its use in automotive power ratings and in some engineering calculations highlights its importance in practical applications.
💡 Fun Facts
- •The pound foot hour is closely related to the imperial measurement system, which is still widely used in the United States.
- •James Watt, known for his work on the steam engine, played a significant role in popularizing the concept of horsepower, which influenced the adoption of the pound foot hour.
- •Unlike SI units, which are universal, the pound foot hour remains primarily used in specific industries and regions, showcasing the persistence of traditional measurement systems.
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🔗 Related Units
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Frequently Asked Questions
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