El siguiente grafico de x contra t ilustra el movimiento de un cuerpo.

radiation warms things up temp rises convection currents air circ windy weather

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.