Completar frases PhysicsVersión en línea Review about Physics concepts por Handy Armenta 1 scientific fields medicine fundamental industries practical applications smallest motion crucial role universe energy time galaxies scientific disciplines behavior Physics natural science space force studies matter engineering subatomic particles phenomena goal technology 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 charges poles the piece iron magnet magnet north each force Opposite along piece other attract aligned direction Magnetism north exerted iron atoms south motion 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 .