Compared to microwaves, the velocity of visible light waves in a vacuum is
A. more
B. the same
C. less
Answer: B. the same
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Uniform Electric Fields: A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct?
A. The potential at all three locations is the same. B. The potentials at points A and B are equal, and the potential at point C is higher than the potential at point A. C. The potential at points A and B are equal, and the potential at point C is lower than the potential at point A. D. The potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest.
Which of the following planets has a ring system?
A) Jupiter B) Saturn C) Uranus D) Neptune E) All of the above
What color are most of the stars closest to the Sun?
What will be an ideal response?
A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. It is then turned off and coasts to a stop in an additional 60 s. The ratio of the average angular acceleration for the first 20 s to that for the last 60 s is which of the following?
a. 3 c. 0.3 b. –3 d. –0.3