Why did Paleolithic people live together in groups ?

Plz me asap! and plz put a real answer! which of the following best describes richard russell's contribution to the war effort? by serving on the senate's naval affairs committee, he investigators learn how the pearl harbor attack was carried out. by to establish military bases like georgia's fort benning, he the state become an important resource to the federal government. by traveling to the war's regions, he develop maps of europe and the pacific. by working with his state's shipyards, he was able to obtain federal contracts to supply the military with ships built in savannah and brunswick.

Which at first gave the south an edge in the civil war? a. a better-equipped army b. the invention of ironclad ships c. the drafting of slaves into the army

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?