What is meant by the redshift?
A. Distant galaxies appear red in color as their light passes through dust.
B. The temperature of distant galaxies is decreasing.
C. The spectral lines of the galaxies are shifted to redder wavelengths.
D. Distant galaxies appear red in color due to having older stars.
E. None of these choices is correct.
Answer: C
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A) -9.0 × 103 V B) 9.0 × 103 V C) -36 × 103 V D) 36 × 103 V E) 0 V
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What will be an ideal response?
An explosion occurs 34 km away. The time it takes for its sound to reach your ears, traveling at 340 m/s, is
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