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a.) Galaxy B moves away from galaxy A at 0.521 times the speed of light. Galaxy C moves away from galaxy B in the same direction at 0.715 times the speed of light. How fast does galaxy C recede from galaxy A? Express your answer as a fraction of the speed of light. b.) Processes at the center of a nearby galaxy cause the emission of electromagnetic radiation at a frequency of 2.71×10^13 Hz. Detectors on Earth measure the frequency of this radiation as 1.69×10^13 Hz. How fast is the galaxy receding from Earth?

a.) Galaxy B moves away from galaxy A at 0.521 times the speed of light. Galaxy C moves away from galaxy B in the same direction at 0.715 times the speed of light. How fast does galaxy C recede from galaxy A? Express your answer as a fraction of the speed of light. b.) Processes at the center of a nearby galaxy cause the emission of electromagnetic radiation at a frequency of 2.71×10^13 Hz. Detectors on Earth measure the frequency of this radiation as 1.69×10^13 Hz. How fast is the galaxy receding from Earth?

College Physics
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter28: Special Relativity
Section: Chapter Questions
Problem 24PE: If a galaxy moving away from the Earth has a speed of 1000 km/s and emits 656 nm light...
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a.) Galaxy B moves away from galaxy A at 0.521 times the speed of light. Galaxy C moves away from galaxy B in the same direction at 0.715 times the speed of light. How fast does galaxy C recede from galaxy A? Express your answer as a fraction of the speed of light.

b.) Processes at the center of a nearby galaxy cause the emission of electromagnetic radiation at a frequency of 2.71×10^13 Hz. Detectors on Earth measure the frequency of this radiation as 1.69×10^13 Hz. How fast is the galaxy receding from Earth?

 
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