When the supreme court makes a ruling on a case that serves to interpret a law passed by congress , it is an example of

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal

What industry was exempt from the child-labor laws passed in the factory act of 1833?

How did jacksonian democracy give more government tal power to the common people