Why was portland important to the start of WW2?

The roosevelt corollary, issued in 1904, was a revision to what earlier statement of u.s. foreign policy?

Is the idea of containment relevant to american foreign and policy today why or why not

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