Why did racial tensions surface in cities during ww2?

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

Which of the following is not one of the five informal ways to amend the constitution? oa) state legislation ob) presidential actions oc) supreme court decisions od) political party activities

Awriter agreement is what ? a. contact b. investment c. solvency d. tariff