All physics laws you need to know

All laws in physics:

1.NEWTON'S FIRST, SECOND  AND       THIRD  LAWS OF MOTION;
 
       Everybody will continue in it's state of rest or uniform motion in a straight line ,unless it is compelled to change that state by external force.
         
      The rate of change of momentum of a body is proportional to the external force and takes place in the direction of the force.

     To every action there is always an equal and opposite reaction.



2      TWO LAW OF ARCHIMEDES

  When a body is totally or partially immersed in a fluid or liquid,the upthrust on it is equal to the weight of the fluid displaced.


   The Archimedes principle of floatation state  that when a body is totally or partially immersed in a fluid, its weight is equal to the weight of the fluid displaced.


3. Hooke's law __States that provided the elastic limit is not exceeded, the extension of a string is directly proportional to the load or force applied.

Hooke's laws of solid friction
     __ friction opposes motion

      __its limiting force is independent of the surface area in contact.

  __The ratio of frictional force (f) to the reaction (R) force of the body's weight on the surface is constant.

__friction depends on the nature of the surfaces in contact.

__ It is independent of the relative speed between the two surface.

4.CHARLES' LAW__ The volume of a given mass of a gas at constant pressure ,the volume is directly proportional to the absolute temperature measured in Kelvin.


5.Boyle's law__the volume of a given mass of a gas varies inversely as pressure upon it,provided the temperature remains constant


6 .Pascal's law of pressure__ the pressure of a given mass of a gas at constant volume increases by 1/273 of its pressure at 0°C per degree rise in temperature.

7.TWO LAWS OF REFLECTION:
  __ incident ray,the reflected ray and normal at the point of incidence all lie on the same plane.

__The angle of incidence( I° ) is equal to the angle of reflection (r°).

8.THE SNELL'S LAWS OF REFRACTION

__ The ratio of sine of angle of incidence to the sine of the angle of refraction is constant for all rays passing from one medium to another.

__The incidence ray ,the normal at the point of incidence and refracted ray are all in the same plane.

9. THREE MICHAEL FARADAY'S LAW
     OF ELECTROLYSIS: He state that;

___The mass ,m of deposition at the electrode during electrolysis is directly proportional to the quantity of electricity Q passing through the electrolyte.

____the same quantity of electricity is passed through different electrolyte, the ratio of the masses deposited at the electrodes is equal to the ratio of their chemical equivalent.

__
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JOULE'S LAW OF ELECTRICAL HEATING STATE THAT;
__The heat energy ( H) obtained in an electrical wire is directly proportional to ;
*  Resistance ,(R) it the current (I) and time (t) are constant.

* Current, if the resistance (R) and time are constant

* Time ,if the resistance (R) and current (I) are   constant.

10.LENZ'S LAW STATES THAT;

   __ The induced current flows in such a direction as to opposed the change producing it .

11.FARADAY'S LAW OF     ELECTROMAGNETIC INDUCTION STATES:

__ the induced electromotive force (e.m .f) in circuit is directly proportional to the rate of change of magnetic flux (or field lines linking the coil).