An injury that does not involve penetration or fracture of the bones of the skull but results from an external blow or from the brain being whipped back and forth rapidly is which of the following?

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u. s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u. s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u. s.