Which factors are most likely to cause an unintentional event to occur?

What is one reason the united states had a two party system

What impact did the gi bill and the interstate highway act of 1957 have on the development of the suburbs

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