Why are valuable ores typically surrounded by less valuable rock?

An object accelarates from rest to a velocity of 2.4m/s over a distance of 16m what was its accelaration

In a government based on the consent of the governed, who has the ultimate authority?

Ineed sociology ! 4. are the nacirema from over 60 years ago (1956, when the article was published) largely the same or different from the nacirema of today, with respect to their views of the body and illness? 5. why don’t we recognize right away that miner is talking about “americans”? using miner’s approach, briefly describe a common activity of your choosing, using a perspective of unfamiliarity (e. g., people at a football game, a formal school dance, a concert). article is attached.