General science

                                                                                                                                                                    

General scientific laws,

 

Newton’s laws of motion

               Are the three law of classical mechanics that describe the relationship between the motion of an object and the forces acting on it.

 

Law 1; (law of inertia)

           A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force. Opposite direction because (inertia laws) (f=0)

Law 2;

            Force= Mass * Acceleration

           When a body is acted upon by a force, the time rate of change of its momentum equals the force.

Law 3;

           If two bodies exert force on each other, these forces have the same magnitude but opposite directions. Rocket launch.

 




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Universal law of attraction;

       F=f.m.m2/r2

R= distance  m= mass

G= 6.674*10-11

Archimedes principle ;

Weight displaced = buoyant  force  --------->

Bath tap

 

Laws of reflection;

-          Incident ray

-          Reflected ray                           ----------->

-          Normal ray 

IR= R.R                                                            

Laws of refraction;

   Cross the boundary

    Speed

 

Snell laws;

     Relation b\w I.R & R.R

 

  Specific gravity / relative density;

S.G = ratio of density of object\ratio of density of water..,