One way in which the code of hammurabi , the twelve tables and the justinian code are similar

Which areas where seperated by the iron curtain

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

How does the balance of trade look different in the us today vs hot it looked in the 70's