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pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid. The pressure exerted on a floor by a 42-pound box the bottom of which has an area of 84 square inches is equal to the force divided by the area over which it is exerted; i.e., it is one-half pound per square inch.
- High-Pressure Phenomena
Studies of matter under high pressure are especially...
- Radiation Pressure
Radiation pressure, the pressure on a surface resulting from...
- Lithostatic Pressure
Other articles where lithostatic pressure is discussed:...
- Osmotic Pressure
osmotic pressure, the amount of force applied to a solution...
- Fluid Pressure
Other articles where fluid pressure is discussed: fluid...
- High-Pressure Phenomena
For example, a brick sitting on a surface exerts a force equal to its weight on the object it is resting on. Now we know that a rectangular brick has a wide surface and a thin surface on the sides. By changing the orientation of the brick resting on a surface, we are effectively changing the pressure acting on the surface by the same brick.
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- The force applied perpendicular to the surface of an object per unit area over which that force is distributed is known as pressure.
- The push or pull on an object with mass that causes it to change its velocity is known as force.
- A pascal can be defined as a force of one newton applied over a surface area of a one-meter square.
- The fluid exerts pressure in all directions because the particles in the fluid can move in all directions. The movement of these molecules results...
- We know that the temperature of the gas is proportional to the average kinetic energy of the molecules. As the kinetic energy increases, the collis...
The pressure gauge on her air tank reads \(6.9 \times 10^6 \, Pa\). What force does the air inside the tank exert on the flat end of the cylindrical tank, a disk 0.150 m in diameter? Strategy. We can find the force exerted from the definition of pressure (Equation \red{pressure}) provided we can find the area \(A\) acted upon. Solution
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.
The gauge pressure is Pg = hρg P g = h ρ g and is found by measuring h h. Figure 11.6.2 11.6. 2: An open-tube manometer has one side open to the atmosphere. (a) Fluid depth must be the same on both sides, or the pressure each side exerts at the bottom will be unequal and there will be flow from the deeper side.
Pressure. Pressure (p) is defined as the normal force F per unit area A over which the force is applied, or \[p = \frac{F}{A} \ldotp \label{14.3}\] To define the pressure at a specific point, the pressure is defined as the force dF exerted by a fluid over an infinitesimal element of area dA containing the point, resulting in p = \(\frac{dF}{dA}\).
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Four quantities must be known for a complete physical description of a sample of a gas: temperature, volume, amount, and pressure. 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 ...
