Pls help pls 20 points ill give brainliest

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

Plz quickly ! which of the following elements is not typical of an advanced society. a. cities b. science c. industries d. a nomadic lifestyle

During the world war 2 the united states government detained 11,000 , german-americans and isolated them in camps for the duration of the war. which term refers to this process