How did women in american colonies significantly contribute to upholding the boycott on british goods during the american revolution?

How did americans disagree over the role of federal and state goverment before and durning the civil war

What impact did entry into ww1 have on life in the us?

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