Pascals Principle free essay sample

This principle, which is known as Pascals principle from being distinctly formulated by him, is the most important in hydrostatics, and finds a practical application in the Hydrostatic press, or Bramahs Press(3) Not only is pressure transmitted out to the surface or  envelope  of the liquid, but within the  fluid  itself the  particlesare all pressed together. When a solid is immersed in the liquid it is pressed at every point of its surface in the direction  perpendicular  to the surface at that point. 3) In every horizontal layer throughout the liquid the pressure per unit  area  is the same; and this is the case independently of the shape of any vessel in which the liquid may be contained. The pressure per unit  area  in any horizontal layer depends only on the height of the free surface of the liquid above the layer considered, and the specific  gravity  of the liquid: and it is equal to the weight of a column of the liquid of unit sectional  area  w hose height is the height of the free surface. We will write a custom essay sample on Pascals Principle or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Hence whatever be the shape or size of several vessels, if all have the same  area  of base, and if in all the water stands at the same height, the pressure on each of the  bases  is the same. (5) When a solid is immersed either partially or wholly in a liquid a portion of the liquid is displaced. The solid is at the same time pressed at every point by the liquid. But the upward pressure on the solid is greater than the downward by an amount equivalent to the weight of the liquid displaced by the solid. Hence we obtain what is called the principle ofArchimedes, namely, that a  body  immersed either wholly or partially in a  fluid  loses a portion of its weight equal to that of the  fluid  which it displaces. This principle is of great importance as regards the floatation of bodies, and the determination of specific  gravity, etc. In regard to the sinking or floating of bodies three different cases may thus arise: First, the weight of the  body  may exceed the weight of the liquid it displaces, in which case the  body  sinks in the liquid; Second, the weight of the  body  may be less than that of the liquid displaced, in which case the  body  will not remain submerged unless forcibly held down, but will rise to the top and partly out of the liquid until the weight of the liquid displaced is equal to its own weight; Third, the weight of the  body  may be equal to the weight of the liquid displaced, in which case it will have little or no tendency either to sink or rise. Research HydrostaticsPASCALS PRINCIPLEIn  physics, Pascals principle states that when a  fluid  completely fills a vessel, and a pressure is applied to it at any part of its surface, that pressure is transmitted equally throughout the whole of the enclosed  fluid.