In this session we are going to deal on the further topics of fluid pressure...
By observing all the propeties of pressure in liquids pascle proposed the law to say the directions of pressure applying in the liquid and its molecules .the below video states the law produced by him and its applications....

even there are so many laws related to the fluid pressure like bernoullis law etc
even more types of pressures are known now a days some of them are stagnation pressure,
surface pressure,buoyant pressure,kinematic pressure,dynamic pressure and static pressures.and there is an other topic which is a special type comes under the gaseous pressure which is another special topic dealed in further posts...

In this blog we are going to have the brief glance on the Fluid pressure.which combine the liquid and gaseous pressures.in this blog lets have liquid pressure.

Fluid pressure is the pressure at some point within a fluid such as water or air. Fluid pressure occurs in one of two situations:

1. an open condition, called "open channel flow", e.g. the ocean, a swimming pool, or the atmosphere.
2. a closed condition, called "closed conduit", e.g. a water line or gas line.

Pressure in open conditions usually can be approximated as the pressure in "static" or non-moving conditions (even in the ocean where there are waves and currents), because the motions create only negligible changes in the pressure. Such conditions conform with principles of fluid statics. The pressure at any given point of a non-moving (static) fluid is called the hydrostatic pressure

              

Closed bodies of fluid are either "static", when the fluid is not moving, or "dynamic", when the fluid can move as in either a pipe or by compressing an air gap in a closed container. The pressure in closed conditions conforms with the principles of fluid dynamics
The concepts of fluid pressure are predominantly attributed to the discoveries of blaise pascle and daniel bernoulli.bernoullie equation can be used in almost any situation to determine the pressure at any point in a fluid. The equation makes some assumptions about the fluid, such as the fluid being ideal and incompressible.An ideal fluid is a fluid in which there is no friction, it is inviscid,zero viscosity. The equation for all points of a system filled with a constant-density fluid is

where:

p = pressure of the fluid

γ = ρg = density·acceleration of gravity = specific gravity of the fluid^.

v = velocity of the fluid

g = acceleration due to gravity

z = elevation

= pressure head

= velocity head

Applications

• Hydraulic brakes
• Artesian well
• Blood pressure
• Hydraulic head
• Plant cell turgidity
• Pythagorean cup

In this blog we are going to deal on the next topic PRESSURE .
what is pressure?
what are the types of pressures? 
Applications of pressure?
first what is pressure.
It is defined as the trust acting per unit area is called the pressure.
what is trust:when a body is placed on the table its force acts at right angle towards the earth which is called the weight of the body or trust due to that body....

pressure is directly proportional to the trust and inversely proportional to the area the area on which the trust is acting.
there are innumerable laws produced based on the types of pressures.they are fluod pressure,atmospheric pressure,gaseous pressure,and so on which can be explained in the further explanations .
Applications of pressure:
1.camels can walk eaisly in deserts because that they have the broad foot which applies less pressure.
2.by increasing the area of contact we can reduce the pressureon the ground examples like heavy trucks,etc.
3.sliding on the snow with a snow skier snow
 etc are the general examples of the applications of the pressure.
Units used to measure pressure are pascles,newtons per square of meters, bars, etc.
In the further posts we can have the better clarity on the types of pressures and laws in them.............

Here is the brief explanation about the four fundamental forces............

 

In this session we are going to deal on the electro magnetic force which is the attractive force between the charged particles,which shows or contains the electric fields,magnetic fields and light as a part if it. it is also a part of the four fundamental interaction in the universe and the other three of them are 1.strong interaction,2.weak interaction and 3.gravitation. we already discussed about the gravitation in the previous topics and we can have the discussion of the other two interactions in the further posts.
coming to the point the electromagnetic force is the force of attraction and in it we may have the sub topics like electromagnetic waves ,field.and in the electromagnetic waves all the waves which we are studying in the physics are related to the EM-waves in any aspects.examples like light,sound,x-rays,gamma-rays,beta,alpha all every thing comes under this EM-waves.
we already said that an EM-wave consist of the electric and magnetic fields.These two fields align perpendicular to each other.we can separate the two forces into the individual forces by using some techniques which leads to the study of a new chapter called polarization. 

        The study of these forces means the sub parts related to the EM waves and its divisions and laws in it can be simply represented as..

Electromagnetism
Electrostatics Electric charge Static electricity Electric field Conductor Insulator Triboelectricity Electrostatic discharge Induction Coulomb's law Gauss's law Electric flux / potential energy Electric dipole moment Polarization density
Magnetostatics Ampère's law Magnetic field Magnetization Magnetic flux Biot–Savart law Magnetic dipole moment Gauss's law for magnetism
Electrodynamics Lorentz force law Electromagnetic induction Faraday's law Lenz's law Displacement current Maxwell's equations Electromagnetic field Electromagnetic radiation Maxwell tensor Poynting vector Liénard–Wiechert potential Jefimenko's equations Eddy current London equations
Electrical network Electric current Electric potential Voltage Resistance Ohm's law Series circuit Parallel circuit Direct current Alternating current Charged current Neutral current Electromotive force Capacitance Inductance Impedance Resonant cavities Waveguides
Covariant formulation Electromagnetic tensor (stress–energy tensor) Four-current Electromagnetic four-potential
Scientists worked on it Ampère    Coulomb    Faraday    Gauss   Heaviside   Henry    Hertz    Lorentz   Maxwell  Tesla   Volta   Weber    Ørsted

Later on we can discuss about each topics related to this........

In this session we are going to deal with the methods to reduce and increase friction.
what are the methods used to reduce the friction?
                                                        1.using wheels
                                                        2.using ball bearings.
                                                        3.using lubricants(like graphite,oils,and someother as per use)
                                                        4.using stream lining.
                                                        5.using air cushions 
                                                        6.Aucostics
by using  all the above items we can reduce the friction to reduce the wear and tear of the materials using are reduced. and the science of friction and lubrication is called tribology.

Super lubricity, a recently discovered effect, has been observed in graphite. it is the substantial decrease of friction between two sliding objects, approaching zero levels. A very small amount of frictional energy would still be dissipated.and

Acoustic lubrication means the use of sound as lubricant.

And another way to reduce friction is producing vibration between the two surfaces.This can be sinusoidal vibration as used in ultrasound-assisted cutting or vibration noise, known as dither

And what increases the friction means if the usage of the above listed items gives a high friction.

    

Applications

Friction is an important factor in many engineering disciplines.

Transportation

• Automobile brakes inherently rely on friction, slowing a vehicle by converting its kinetic energy into heat. Incidentally, dispersing this large amount of heat safely is one technical challenge in designing brake systems.
• Rail adhesion refers to the grip wheels of a train have on the rails, see Frictional contact mechanics.
• Road slipperiness is an important design and safety factor for automobiles
  • Split friction is a particularly dangerous condition arising due to varying friction on either side of a car.
  • Road texture affects the interaction of tires and the driving surface.
  • in welding metals

Measurement

• A tribometer is an instrument that measures friction on a surface.
• A profilograph is a device used to measure pavement surface roughness.

Household usage

• Friction is used to heat and ignite matchsticks (friction between the head of a matchstick and the rubbing surface of the match box).