Describe two weaknesses in the economy in the 1920s

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 did the introduction of silk into the mediterranean do for the abbasid empire

During the 1800s, an important pull factor for immigrants to the united states was