What methods allowed the Safavid Empire to expand?

Was the first african american to be appointed to the u.s. supreme court.

Brainliestttme : ) what are trading blocs and what is the impact of international cooperation?

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