Explainpressure measuring device at any point in fluid in short.

1.	Explainpressure measuring device at any point in fluid in short.
Answer» SOLUTION :An idealized form of pressure -measuring device is shown in the figure . It consists of an EVACUATED CHAMBER with a spring that is calibrated to measure the force acting on the piston. This device is placed at a point inside the fluid. The inward force exerted by the fluid on the piston is balanced by the OUTWARD spring force and is thereby measured . The force `DeltaF` acting on the surface of the piston then pressure of fluid `P=(DeltaF)/(DeltaA)` The piston area can be made arbitraaily small . The pressure is then DEFINED in a limiting sense as `P=underset(DeltaAto0)(lim)(DeltaF)/(DeltaA)`

Discussion