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Learn how to define pressure as a measure of force per unit area, and how to calculate it for different substances and situations. Explore the ideal gas law, liquid pressure, and negative pressure with examples and sources.
Pressure is force per unit area of surface; the SI unit for pressure is the pascal (Pa), defined as 1 newton per square meter (N/m 2 ). The pressure exerted by an object is proportional to the force it exerts and inversely proportional to the area on which the force is exerted.
Jun 14, 2023 · What is Pressure? Pressure is defined as force/area. For instance, the pressure from snow on a roof would be the weight of the snow divided by the area of the roof. In chemistry, usually pressure comes from gases. When you blow up a balloon, you put gas inside. The gas molecules bump into each other and into the walls of the balloon.
Pressure is the amount of force exerted per area. Learn how to calculate pressure in fluids using the formula P = ρ g h, where ρ is the density of the fluid, g is the acceleration due to gravity and h is the depth below the surface.
- Why is not possible to have negative absolute pressure?If you have no pressure then there are no atoms that can be there.
- why boiling point of water decreases as the pressure goes down? Is here a video that explain this ph...What applies pressure to the surface of a boiling liquid? You may answer, the air molecules. That is absolutely correct. But what about the molecul...
- It is said in the article that the weight of air is actually not negligible. My question is: if you'...Pressure acts in all directions. When you are in your house, the air is pushed through windows, through doors, through every little crack until the...
- How can we differentiate Pressure from stress?When we are dealing with fluids (liquid and gases) ,, we use the term pressure And when we are dealing with metals or any solid object we use the t...
- "unlike the water example, the density of the air in the atmosphere is not the same at all altitudes...You are right. Water is often considered "incompressible" to simplify physics calculations, because it is so hard to compress. This is the same kin...
- I have a question, if im in space am i exerting pressure on something?if there is zero gravity then no .as weight = mg, if g is zero then weight is zero.as there is no force(weight)there is no pressure
- so can we also say that the pressure of the air above us is counteracted by our blood pressure that ...Generally the pressure inside our blood vessels is 80-120 mm-Hg (gauge pressure). So why we do not burst out: Because of the mechanical strength of...
- i understood that the fluid is pushing downwards on the top of the immersed object due to gravity bu...when you go underwater, where do you feel the pressure? top of your head? or ears? any deeper, you would feel it on your chest too. its because you...
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. [1] : 445 Gauge pressure (also spelled gage pressure) [a] is the pressure relative to the ambient pressure. Various units are used to express pressure.
Jan 20, 2022 · Learn the pressure definition in science as force per unit area, its units, formula, and examples. Pressure is a scalar quantity that can be positive or negative depending on the direction of the force.
Learn how to define and measure pressure, the force of gas particle/wall collisions, in different units such as pascals, atmospheres, and millimetres of mercury. See examples, conversions, and exercises on pressure.
