PLS ANSWER QUICKLY! How did harsh climates and warmer climates affect American Indian cultures differently?

According to thomas hobbes concept of the social contract, what do people exchange for the protection by the government?

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

True or false: a trust is a giant corporation made up of a group companies