What tools and methods do people use to solve the various problems they face?

How was the government that was created at the constitutional convention similar to the one proposed in the virginia plan?

List of social classes of the shang dynasty in order ?

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