Mod 3 Ex - module 3 PDF

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SCIE 4004 Mod. 3 Exercise

Grade :

0 (most questions not answered)

.5 (some questions not answered)

1 (all questions answered thoroughly)

Astronomy Ranking Task: Doppler Shift Exercise 1 Description: The figure below shows a train traveling toward the right and sounding its horn. Three persons are shown at locations A, B, and C. Assume that all three people can hear the train blowing its horn.

A. Ranking Instructions: Rank the pitch of the horn from highest pitch (or frequency) to lowest pitch (or frequency) as heard by each person (A – C) Ranking Order: Highest 1__C_____ 2__A_____ 3____B___ Lowest Or, the pitch heard by each person would be the same. ______ (indicate with check mark). Carefully explain your reasoning for ranking this way: Person C shows the smallest wavelength, so they hear the highest pitch. Person A is the source, they have the next smallest wavelength. Person B has the largest wavelength and is farther away so they hear the lowest pitch. B. Ranking Instructions: Rank the wavelength (from longest to shortest) of the sound of the horn as heard by each person (A – C). Ranking Order: Longest 1____B___ 2__A_____ 3__C_____ Shortest Or, the wavelength heard is the same for each person.____ (indicate with check mark). Carefully explain your reasoning for ranking this way: Person C hears the highest pitch, they have the smallest wavelength. Person B hears the lowest pitch, they have the longest wavelength.

The materials above are collectively the work of David Hudgins (Rockhurst University), Kevin Lee (University of Nebraska), and Edward Prather (University of Arizona). They may be used freely for any non-profit educational purpose – other uses require permission. Contributions to the programming were made by Renee Augustyn, Andy Frederick, Keith Nickum, and Chris Siedell. The work is supported by an NSF grants nos. 0737376 and 0715517, a CCLI Phase III Grant for the Collaboration of Astronomy Teaching Scholars. (CATS).

SCIE 4004 Mod. 3 Exercise

Astronomy Ranking Task: Gravity Exercise 2 Description: The figure below shows the motion of five distant stars (A - E) relative to a stationary observer (telescope). The speed and direction of each star is indicated by the length and direction of the arrows shown.

Ranking Instructions: Rank the Doppler shift of the light observed from each star (A – E) from greatest “blueshift”, through no shift, to greatest “redshift”. Ranking Order: Greatest blueshift 1_E_, 2___D_, 3__B_ 4 __C__ 5 __A__ Greatest redshift Or, the Doppler shift for each star is the same. ______ (indicate with check mark). Carefully explain your reasoning for ranking this way:

E is moving fastest towards the observer, the observer sees the greatest blueshift. Star D is similar to E, it is also moving towards the observer but with slower pace. Star B is moving perpendicularly, there is lack of blueshift or redshift. Star A has the greatest redshift as it is moving fastest away from the observer. Star C is similar to star A but with slower pace.

The materials above are collectively the work of David Hudgins (Rockhurst University), Kevin Lee (University of Nebraska), and Edward Prather (University of Arizona). They may be used freely for any non-profit educational purpose – other uses require permission. Contributions to the programming were made by Renee Augustyn, Andy Frederick, Keith Nickum, and Chris Siedell. The work is supported by an NSF grants nos. 0737376 and 0715517, a CCLI Phase III Grant for the Collaboration of Astronomy Teaching Scholars. (CATS).

SCIE 4004 Mod. 3 Exercise

Exercise #3 Description: The first spectrum shown below is of an element as it appears in a laboratory here on Earth. In addition, the spectra of five stars (A - E) as seen from Earth are shown. Assume that the left end of each spectrum corresponds to shorter wavelengths (blue light) and that the right end of each spectrum corresponds with longer wavelengths (red light).

A. Ranking instructions: Rank the size of the Doppler shift (from largest to smallest) for the light from each star (A – E). Ranking Order: Largest 1 __C__ 2 __B__ 3 __A__ 4 __D___ 5 __E___ Smallest Or, the Doppler shift of the light from the stars would all be the same. _____ (indicate with a check mark) Carefully explain your reasoning for ranking this way: In reference to the lab spectra, the double line in the blue area is shifted the most at Star C. star B is shifted the most to the left. Star A is shifted slightly to the right. Star D is shifted slightly to the left. Star E has no shift.

The materials above are collectively the work of David Hudgins (Rockhurst University), Kevin Lee (University of Nebraska), and Edward Prather (University of Arizona). They may be used freely for any non-profit educational purpose – other uses require permission. Contributions to the programming were made by Renee Augustyn, Andy Frederick, Keith Nickum, and Chris Siedell. The work is supported by an NSF grants nos. 0737376 and 0715517, a CCLI Phase III Grant for the Collaboration of Astronomy Teaching Scholars. (CATS).

SCIE 4004 Mod. 3 Exercise

B. Ranking instructions: Rank the speed of the stars (A – E) from moving fastest toward the Earth to moving fastest away from Earth. Ranking Order: Moving fastest toward 1 _B___ 2 _D___ 3 _E___ 4 _A____ 5 __C___ Moving fastest away Or, all the stars have the same speed. _____ (indicate with a check mark) Carefully explain your reasoning for ranking this way: Star B moves the fasted towards Earth because the double line at farthest the Blueshift area. Star D is next because the double line at middle the Blueshift area. Star E is next because it has no shift. Star A is next as it is moving away from Earth, slightly move to the right, the redshift. Star C is farthest away because it shifts to the red spectrum the most.

The materials above are collectively the work of David Hudgins (Rockhurst University), Kevin Lee (University of Nebraska), and Edward Prather (University of Arizona). They may be used freely for any non-profit educational purpose – other uses require permission. Contributions to the programming were made by Renee Augustyn, Andy Frederick, Keith Nickum, and Chris Siedell. The work is supported by an NSF grants nos. 0737376 and 0715517, a CCLI Phase III Grant for the Collaboration of Astronomy Teaching Scholars. (CATS)....