Carla sees an equation that models a nuclear change. which nuclear process does the equation illustrate? nuclear fission, because the equation shows two hydrogen nuclei combining to form a helium nucleus nuclear fission, because the equation shows a hydrogen nucleus breaking apart and releasing a neutron nuclear fusion, because the equation shows two hydrogen nuclei combining to form a helium nucleus nuclear fusion, because the equation shows a hydrogen nucleus breaking apart and releasing a neutron

Nuclear fusion is the name of the reaction where two hydrogen nuclei combine to form a helium nucleus.  That's approximately the third choice in that big amorphous blob of choices.

We have no way to tell what nuclear process is illustrated by the equation that Carla is looking at, because we don't know what that equation looks like.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

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.