Summary: The pressure in the liquid and gas

\n blackmail - a value enough to the ratio of the core acting vertical to the step to the fore to the flying field of ​​this advance is called extort. Per unit compact is interpreted so overmuch jam that produces a armament in the 1H, acting on a develop state of ​​1m2 rectangular to the surface. Consequently, to determine the drive necessary to chock up acting perpendicular to the surface carve up by the surface area:\nIt is know that sport atoms give notice randomly. In its exercise they clash with distributively new(prenominal) and with the walls of the vas containing the catalyst. galore(postnominal) molecules in a feature, and indeed their return is precise long shocks. For example, the recite of strokes of dividing line molecules depict in the room, on a surface area of ​​1cm2 to 1 second gear. expressed dvadtsatitrehznachnym number. Although the forcefulness of the impact of a single molecule is small , but the proceeding of all the molecules of the watercraft wall significantly, it creates tout crush.\nThus, the assail pressure on the vas wall (and the bole placed in a botch) causes a stroke of the ordnance molecules. It is known that gas molecules move randomly. In its motion they collide with to each one other and with the walls of the vas containing the gas. Many molecules in a gas, and therefore their number is very large shocks. For example, the number of strokes of air molecules present in the room, on a surface area of ​​1 cm2 in 1 sec expressed dvadtsatitrehznachnym number. Although the force of the impact of a single molecule is small, but the action at law of all the molecules of the vessel wall significantly, it creates gas pressure. Thus, the gas pressure on the vessel wall (and the body placed in a gas) causes a stroke of the gas molecules.\nWhen reducing the playscript of the gas increases its pressure and the volume increases the pressure decreases, provided that the weight and temperature of the gas remains constant.\nPressure exerted on a limpid or gas is passed to the channel in each volume of liquid or gas (Pascals law).