Question

difference between atmospheric pressure and liquid pressure in Four Points​

Answer 1

Answer:

Pressure describes the density of a liquid or gas. The more air or water there is in relation to the container it is in, the higher the pressure. Gas and fluid pressure both affect their respective materials in the same way — air and water both move from areas of high pressure to areas of low pressure.

Gases and liquids are both considered 'fluids' because they can flow from one point to another. Fluid pressure is the pressure exerted by a fluid, directly proportional to the specific gravity at any point and to the height of the fluid above the point.

However, if we compare air-pressure (atmospheric) and liquid-pressure (fluid), then the difference is that liquids are nearly incompressible, and conforms to the shape of its container but retains a nearly constant volume independent of pressure. — while air is a compressible fluid — its density changes with pressure.

Answer 2

Answer:

Hydrostatic pressure is the pressure exerted by an incompressible fluid (a liquid) at a given point, due to the weight of the fluid above it. Atmospheric pressure is the pressure exerted on a surface by the weight of the atmosphere (a compressible fluid) above it.