Introduction
Fluids means a substance that can flow.Liquid and gas are collectively called fluid.Liquid and gas are collectively called fluid.Fluid flows under the action of force or pressure.
Property of ideal gas:
-It is incompressible.
-It flow is irrational and no turbulence is flow.
– It is non Vegas.It flu is steady
Compressible
The force which is used to compress the object.
Tensile
The force which is used to extend object.
Properties of fluids
-They have ability to flow.
-They have ability to take shape of container.
Fluid at rest
The branch of physics which deals with the properties of fluid is called hydrostatic.
Pressure
Any fluid at rest exert pressure force on the contact.
- Wall of container
- Surface
Atmospheric pressure
– Made or formed up by fluid i.e air
– Exerts download force due to its weight
– The pressure due to this force is called at atmospheric pressure
– Hightake the surface of earth that is sea level
Vaccum
Reason where gas pressure is less than the atmospheric pressure is called vacuum.
Real vaccum
Where there is no any molecules ,matters atoms, ions in the region.
Pascal law
Pascal laws state that pressure applied at any point of the enclose fluid at rest is transmitted equally and undiminished to any point of the fluid and also on the walls of the container provided certain piston.
Measurement of pressure
Instrument are used
- Pressure meter
2. pressure gange
3. vaccum gavge
Mercury barometer
And instrument which major atmospheric pressure is called as barometer.
Intermolecular force
Matter is made up of molecule.
Any molecules attract each other by same force we called it a intermolecular force.
Cohesive
The force between two molecules of same substance is called cohesive force.
Strongest in solid and weakest In gas.
Hence solid has definite shape.
