P B P A \u03d2 hIn some cases all points on a horizontal surface in a static body of

# P b p a ϒ hin some cases all points on a horizontal

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P B =P A + ϒ h In some cases, all points on a horizontal surface in a static body of water are subjected to the same hydrostatic pressure. The following conditions need to be met to satisfy a surface of equal pressure: Abdelal
1. Points on the surface are all in the same liquid 2. Points are at the same elevation 3. The liquid containing the points must be connected. Abdelal
A pressure applied at any point in a liquid at rest is transmitted equally and undiminished in all directions to every other point in the liquid Abdelal
The diameters of cylindrical pistons A and B are 3cm and 20 cm respectively. The faces of the pistons are at the same elevation, and the intervening passages are filled with an incompressible hydraulic oil. A force P of 100 N is applied at the end of the level as shown. What weight W can the hydraulic jack support? Abdelal
A piezometer is a pressure measurement device, composed of a vertical tube, usually transparent in which a liquid rises in response to a positive gage pressure. Gage pressure at the center of the pipe = ϒ h Adv. : Simple, direct measurement Disadv .: Can’t be used with gas, Limited to low pressure Abdelal
Also pressure measurement devices, composed of a bent tube in the form of U that contains a fluid with a known specific gravity. Could be either : a) Open manometer or b) differential manometer Abdelal
For open manometers: 𝛾 𝑚 ℎ = 𝑃 ?

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• Winter '17
• Pressure measurement, Vacuum, Water Pressure

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