Asked in Uncategorized
What is 1 Pa of pressure?
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Asked in Science, Physics, Isaac Newton, Mathematicians
Explain Pascal's law?
Pascal's Law states that when there is an increase in pressure at any point in a confined fluid/liquid, there is an equal increase at every other point in the container. Example : In a container that contains a fluid. In a certain point # 1 the pressure is 1 Pa, in point # 2 the pressure is 3 Pa and at point # 3 the pressure is 5 Pa. Now, a pressure of 10 Pa was added, therefore the resulting pressures in points #1, # 2 # 3 are 11 Pa, 13 Pa and 15 Pa respectively. Hope this clarifies your question.
How do you measure pressure?
Asked in Units of Measure
Does Pa mean Pounds of Pressure?
Asked in Science, Units of Measure, Physics
Pressure can be calculated as forcearea How much pressure is exerted by applying 1000 N of force over 2 m of area Hint 1 pascal 1 N exerted over 1 m?
What is the pressure?
What does pressure do?
Asked in Kinematics
What is the pressure due to a depth of 10m of water?
Asked in Chemistry
What is the total pressure of the gas in the container if the atmospheric pressure is 101.325 Pa?
Asked in School Subjects
A tank with a flat bottom is filled with water to a height of 3.5 meters What is the pressure at any point at the bottom of the tank You can ignore atmospheric pressure when calculating your answer?
Asked in Units of Measure, Physics
Does 750 newtons have a greater pressure than 500 newtons?
Asked in Science, Math and Arithmetic, Education
How do you find gauge pressure from absolute pressure?
The pressure in a fluid is defined as "the normal force per unit area exerted on a imaginary or real plane surface in a fluid or a gas" The equation for pressure can expressed as: p = F / A (1) where p = pressure [lb/in2 (psi) or lb/ft2 (psf), N/m2 or kg/ms2 (Pa)] F = force [1), N] A = area [in2 or ft2, m2] 1) In the English Engineering System special care must be taken for the force unit. The basic unit for mass is the pound mass (lbm) and the unit for the force is the pound (lb) or pound force (lbf). Absolute Pressure The absolute pressure - pa - is measured relative to the absolute zero pressure - the pressure that would occur at absolute vacuum. All calculation involving the gas laws requires pressure (and temperature) to be in absolute units. Gauge Pressure A gauge is often used to measure the pressure difference between a system and the surrounding atmosphere. This pressure is often called the gauge pressure and can be expressed as pg = ps - pa (2) where pg = gauge pressure ps = system pressure pa = atmospheric pressure Atmospheric Pressure Atmospheric pressure is pressure in the surrounding air at - or "close" to - the surface of the earth. The atmospheric pressure vary with temperature and altitude above sea level. Altitude and Air Density Standard Atmospheric Pressure Standard Atmospheric Pressure (ATM) is used as a reference for gas densities and volumes. The Standard Atmospheric Pressure is defined at sea-level at 273oK (0oC) and is 1.01325 bar or 101325 Pa (absolute). The temperature of 293oK (20oC) is also used. In imperial units the Standard Atmospheric Pressure is 14.696 psi. 1 ATM = 1.01325 bar = 101.3 kPa = 14.696 psi (lbf/in2)= 760 mmHg =10.33 mH2O = 760 torr = 29.92 inHg = 1013 mbar = 1.0332 kgf/cm2 = 33.90 ftH2O Pressure Units Since 1 Pa is a small pressure unit, the unit hectoPascal (hPa) is widely used, especially in meteorology. The unit kiloPascal (kPa) is commonly used design of technical applications like HVAC systems, piping systems and similar. 1 hectoPascal = 100 Pascal = 1 millibar 1 kiloPascal = 1000 Pascal Some Pressure Levels 10 Pa - the pressure below 1 mm of water 1 kPa - approximately the pressure exerted by a 10 g of mass on a 1 cm2 area 10 kPa - the pressure below 1 m of water, or the drop in air pressure when moving from sea level to 1000 m elevation 10 MPa - nozzle pressure in a "high pressure" washer 10 GPa - pressure enough to form diamonds Some Alternative Units of Pressure 1 bar - 100,000 Pa 1 millibar - 100 Pa 1 atmosphere - 101,325 Pa 1 mm Hg - 133 Pa 1 inch Hg - 3,386 Pa A torr (torr) is named after Torricelli and is the pressure produced by a column of mercury 1 mm high - equals to 1 / 760th of an atmosphere. 1 ATM = 760 torr = 14.696 psi Pounds per square inch (psi) was common in U.K. but has now been replaced in almost every country except in the U.S. by the SI units. Since atmospheric pressure is 14.696 psi - a column of air on a area of one square inch area from the Earth's surface to the space - weights 14.696 pounds. The bar (bar) is common in the industry. One bar is 100,000 Pa, and for most practical purposes can be approximated to one atmosphere even if 1 Bar = 0.9869 ATM There are 1,000 millibar (mbar) in one bar, a unit common in meteorology. 1 millibar = 0.001 bar = 0.750 torr = 100 Pa