Which type of plastic construction materials can be reheated, melted, and remolded into new shapes?

Hypotension, distended neck veins, and muffled or distant heart tones in which the heartbeat is difficult to auscultate are hallmark signs of:

a. pericarditis. b. congestive heart failure. c. aortic aneurysm. d. pericardial tamponade.

Two cars have collided head on. One car was traveling 55 mph and the other 35 mph. The total speed of impact would be:

A) 55 mph. B) 90 mph. C) 20 mph. D) 35 mph.