In which of the following cases is the displacement's magnitude half the distance traveled?
a. 10 steps east followed by 3 steps west
b. 28 steps east followed by 14 steps west
c. 6 steps east followed by 24 steps west
d. 12 steps east followed by 4 steps west
e. 5 steps east followed by 25 steps west
d
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In an H-R Diagram, stars with the smallest radius are found in the ____ of the diagram
a. center b. upper left corner c. upper right corner d. lower left corner e. lower right corner
The equator receives the same amount of sunlight from season to season
a. True b. False Indicate whether the statement is true or false
Two light sources are said to be coherent if they
A) are of the same frequency. B) are of the same amplitude. C) are of the same frequency, and maintain a constant phase difference. D) are of the same amplitude, and maintain a constant phase difference. E) are of the same frequency and amplitude.
Is this a photo of a spiral galaxy or an elliptical galaxy, and how do you know?
A) It is a spiral galaxy because we can see a dusty disk going across the center. B) It is a spiral galaxy, and we know because photos of this same galaxy from above show its spiral arms. C) It is an elliptical galaxy because it is elliptical in shape. D) It is an elliptical galaxy because it looks red/yellow in color.