Two identical 7-kg bowling balls roll toward each other. The one on the left is moving at +4 m/s while the one on the right is moving at -4 m/s. What is the velocity of each ball after they collide elastically?
a. Neither is moving.
c. +4 m/s, -4 m/s
b. -14 m/s, 14 m/s
d. -4 m/s, +4 m/s
Question 2
If a negative charge is placed inside a hollow isolated conductor that is originally neutral and the charge does not touch that conductor at any time:
a. both the inner and outer surfaces will become negative.
b. both the inner and outer surfaces will remain neutral.
c. the outside surface of the conductor will become positively charged. d. the inside surface of the conductor will become positively charged.
Acromegaly in one individual from a pair of identical twins.
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