Compléter PhysicsVersion en ligne Review about Physics concepts par Handy Armenta 1 technology studies matter natural science engineering crucial role practical applications time scientific disciplines galaxies industries scientific fields phenomena energy goal behavior subatomic particles universe space medicine fundamental force motion smallest Physics is the that , its and through and , and the related entities of and . Physics is one of the most , and its main is to understand how the behaves . It encompasses a wide range of , from the to the largest . Physics plays a in many other and has in various , including , , and . 2 north north aligned the poles exerted magnet other piece iron magnet force attract iron along Opposite charges Magnetism atoms direction piece each motion south Magnetism is the force by magnets when they or repel each other . is caused by of electric . All magnets have and poles . poles are attracted to other , while the same repel each . When you rub a of a , the - seeking poles of the in the iron line up in the same . The generated by the atoms creates a magnetic field . The of has become a .