While the first wave of immigrants to the united states was largely from northern and central europe (ireland and germany). where did most of the second wave of immigrants come from?

The chemical or mechanical process by which rock is gradually broken down eventually becoming soil

Zac wanted to determine the measure of r and of ? r in the triangle below. to fine the measure of r, zac sets up the problem.42^2 + 24^2 = r 2. determine whether zac set the problem up correctly.

Who were the kelvin-rus? describe who influenced them.