Earth Science (nasta Edition) 15th Edition
15th Edition
ISBN: 9780134656816
Author: Tarbuck Lutgens
Publisher: PEARSON
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Question
Chapter 23, Problem 1GST
To determine
The star, by referring the given spectra representing four identical stars in a galaxy. When one star is not moving relative to the observer, another is moving away from observer, and two stars are moving towards the observer.
Expert Solution & Answer
Answer to Problem 1GST
The movement of four identical stars by referring the given spectra is as follows:
- Star A is moving away from the observer because the overall shift is towards the end of the absorption line spectrum.
- Star B is not moving relative to the observer.
- Stars C and D are moving towards the observer because both A and B have shifted towards the blue end of the absorption line spectrum.
Explanation of Solution
The Doppler effect is the variation in wavelength or frequency of a wave for an observer who is moving relative to the wave source.
The Doppler Effect for stars is observed by comparing the lines in the absorption spectrum; the shifting of spectral lines towards the long end of the
The shifting of spectral lines towards the short end of electromagnetic spectrum indicates that the star is moving towards the observer. The amount of shifting gives information about the speed at which the object is moving (either towards or away from the observer).
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▲ Figure 9.7 This diagram showing common depositional landforms depicts a hypothetical area affected by ice
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Figure 9.9 is a stereogram showing a portion of the area covered by the Whitewater, Wisconsin, topographic map (Figure 9.10, page 160). Use the stereogram and the map to complete the following.
7. The streamlined, asymmetrical hills composed of till, labeled B, are what type of feature?
8. Examine the shape of the features labeled B on the map in Figure 9.10. How can these features be used to determine the direction of ice flow in a glaciated area?
9. Using the features labeled B in Figure 9.10 as a guide, draw an arrow on the map to indicate the direction of ice movement that occurred in this region.
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Chapter 23 Solutions
Earth Science (nasta Edition) 15th Edition
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