When astronomers study the light emitted from the Sun they notice that the light emitted from the east limb (edge) is blueshifted while the light emitted from the west limb is redshifted. The reason for this is that
A. the Sun is rotating.
B. the Sun contains different chemicals that emit different colors.
C. the two opposing limbs have different surface temperatures.
D. the distance between Earth and the Sun is constantly changing.
Answer: A
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A 1200-kg car is supported equally by the four tires, which are inflated to the same gauge pressure. What gauge pressure is required so the area of contact of each tire with the road is 100 cm2?
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Which of the following changes would cause the fusion rate in the Sun’s core to increase?
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Waves arriving at a fixed boundary are
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