A force applied to a specific amount of surface area A common unit of pressure is psi, i e , pounds per square inch The force that develops the pressure is sum total of all the slight "nudges" on a surface generated by each molecule striking the surface; the greater number of impacts or the more violent each impact, the greater the pressure Therefore, the pressure increases if the same number of molecules are contained in a smaller space (greater number of impacts per unit area) or if the molecules are heated (each impact is more violent) Also see psi
If you pressure someone to do something, you try forcefully to persuade them to do it. He will never pressure you to get married The Government should not be pressured into making hasty decisions Don't pressure me His boss did not pressure him for results. + pressured pres·sured You're likely to feel anxious and pressured. see also blood pressure. to try to make someone do something by making them feel it is their duty to do it British Equivalent: pressurizepressure sb into doing sth. Perpendicular force per unit area, or stress at a point within a confined fluid. A solid object exerts pressure on a floor equal to its weight divided by the area of contact. The weight of the Earth's atmosphere on the surface constitutes atmospheric pressure, which varies from place to place but always decreases with altitude. The pressure exerted by a confined gas results from the average effect of the forces produced on the walls of the container by the continual, numerous collisions by gas molecules. Hydrostatic pressure is the stress, or pressure, exerted equally in all directions at points within a confined fluid. Lithostatic pressure is the stress exerted on a body of rock in the Earth's crust by surrounding rock, which increases with depth below the surface. The SI unit of pressure is the pascal (Pa), which is equal to one newton of force per square metre. high blood pressure low blood pressure atmospheric pressure barometric pressure blood pressure pressure gauge radiation pressure
Pressure is the result of Force divided by the Area the force is applied over It is measured in Newtons per meter squared [N/m2] which is also known as a Pascal [Pa]
Force applied to or distributed over a surface; it is measured as force per unit area
the state of urgently demanding notice or attention; "the press of business matters"
The force per unit area in a gas or liquid, typically expressed as pounds per square inch in the US The scientific unit is newtons per m2 (also known as the pascal) For instance, atmospheric pressure at sea level on Earth equals 14 7 lbs /in2 = 1 01 x 105 newtons per m2 The pressure at the center of the Sun is approximately 300 billion Earth atmospheres, or 3 x 1016 newtons per m2
Force per unit area; more precisely, the magnitude of a compressional stress (measured in kPa)
Force acting on an area Expressed in a variety of ways for which a conversion table is given Pressure is important in aquaculture from the design of systems (to enable sizing of pumps and prediction of flows) to applications such as the induction of triploidy through subjecting eggs to high pressure treatments Many diffusers have optimum pressure ratings, where they are most efficient at delivering the required gas into the water see also friction loss water, friction loss air
The act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand
the somatic sensation of pressure; "the sensitivity of his skin to pressure and temperature was normal"
The pressure in a place or container is the force produced by the quantity of gas or liquid in that place or container. The window in the cockpit had blown in and the pressure dropped dramatically
The action of a force against some obstacle or opposing force; a force in the nature of a thrust, distributed over a surface, often estimated with reference to the amount upon a unit's area
the act of pressing; the exertion of pressure; "he gave the button a press"; "he used pressure to stop the bleeding"; "at the pressing of a button"
the apparently continuous and isotropic force exerted on unit area of any real or imaginary surface because of bombardment by molecules of contiguous fluid
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