In order to see a rainbow, the Sun must be directly in front of you
a. True
b. False
Indicate whether the statement is true or false
False
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Science later greatly advanced when Galileo favored
A) philosophical discussions over experiment. B) experiment over philosophical discussions. C) nonmathematical thinking. D) none of the above
What is the current flowing through the 2-? resistor?
a.
2 A
b.
3 A
c.
4 A
d.
6 A
Two identical balls have the same amount of charge, but the charge on ball A is positive and the charge on ball B is negative. The balls are placed on a smooth, level, frictionless table whose top is an insulator. Which of the following is true?
a. Since the force on A is equal but opposite to the force on B, they will not move. b. They will move together with constant acceleration. c. Since the force on both balls is negative, they will move in the negative direction. d. None of the above is correct.
Consider two copper wires. One has twice the length of the other. How do the resistances of these two wires compare?
A) Both wires have the same resistance. B) The longer wire has half the resistance of the shorter wire. C) The longer wire has twice the resistance of the shorter wire. D) none of the given answers