Which of the following materials is most likely to undergo reduction?
A) Na
B) Na+
C) Cl2
D) Cl-
E) both A and B
Answer: C
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Models for combining the electromagnetic, weak and strong nuclear interactions into a single basic force are __________
Fill in the blank(s) with correct word
Side branches on a polymer _________the density, crystallinity, yield strength, and elastic modulus.
Fill in the blank(s) with the appropriate word(s).
A person weighing 500 N rides on a Ferris wheel sitting on a bathroom scale. At the highest point of motion, the scale reads 200 N while the person continues to move in a circular path. The centripetal force on the person at this point is ________ N.
Fill in the blank(s) with the appropriate word(s).
A 2.0 kg ball is attached to one end of a light rod that is 1.2 m long. The other end of the rod is loosely pinned at a frictionless pivot. The rod is raised until it is vertical, with the ball above the pivot
The rod is released and the ball moves in a vertical circle. The tension in the rod as the ball moves through the bottom of the circle is closest to: A) 20 N B) 40 N C) 60 N D) 80 N E) 100 N