What economic need is often cited by historians as a reason for the colonization of other countries by europe?

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 combination would the president most likely use to convince congress to pass an economic stimulus bill?

Name 3 significant impacts of the tet offensive on the outcome of the war, it's participants, or the public image of the war.