Density and Elasticity

 

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Important points for Entrance

Liquid pressure is always perpendicular to surface area under consideration. •               Pressure acts equally in all possible directions. •               Liquid pressure depends on depth (h) of point below free surface, density  of liquid and acceleration due to gravity (g) at the place. •               Liquid pressure is independent of amount of liquid, shape of vessel and area of consideration. So a given liquid is filled in vessels of different shapes to same heights then pressure at the base of each vessels will be same. •               Pressure will be same at all points in a liquid lying at the same level. Therefore the height of liquid level at rest is equal in all vessels of different shapes and sizes when the...
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Something you must know before starting studying Physics

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 In the development of physics it turned out again and again how difficult, but also important it was to develop the most suitable concepts and find the relevant quantities (e.g. force or energy) in terms of which nature can be described both simply and comprehensively.Every physical quantity consists of a a measured value and a measuring unit, i.e. a pure number and a dimension. All difficulties in conversations are avoided, if we treat both parts like a product “value times dimension”. Insert: Denotations: It is an accepted thing in international physics for long time past to abbreviate as many of the physical quantities as possible by the first letter of the corresponding English word, e.g. s(space), t(time), m(mass), v(velocity), a(acceleration), F(force), E(energy), p(pressure), R(resistance), C(capacity), V(voltage), T(temperature), etc.. Of course there are some exceptions from this rule: e.g. momentum p, angular momentum l, electric current I or potential V.     ...
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