Which nations were superpowers after world war ii?

Woodrow wilson called the supreme court "a constitution convention in continuous session." what did wilson mean by this?

Which battle was one of the most devastating for

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