Which industry had not been started prior to the civil war? a) railroad b) telegraph c) plastic production d) steel production

Large igneous rock have been found on surface sedimentary bedrock in north carolina .which statement best xplains the presence of these boulders

How did testimony such as this from the triangle shirtwaist factory disaster affect the workplace?

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