It’s the Russians who survived mongol attacks thought their conquerors were invincible
Answer: slave labor formed the America colonial economy
Explanation:
Souths economy depended on mostly cotton. when the cotton gen fastened the process, they mass produced it. and made lots of money than before. such was depended on agriculture while north had factories. yet cottons still didn't make that much as industries
Because it is important to know the composition of the object
Density is the ratio of the mass of a sample to the volume occupied by that mass, and expresses how much mass there is per unit volume of a given portion of matter. Density is a physical property of extreme importance in the characterization, identification and use of substances or materials.
