Question 1

What is the most common kind of star? What measurements must be made to discover this information?

Accepted Answer

The most common kind of star in the univ...

Question 2

Why are spectroscopic binaries difficult to analyze?

Accepted Answer

A)  We can't see the shape or tilt of the orbit.
B)  We can't find the diameters of the stars.
C)  We can't determine the luminosities of the stars.
D)  The Doppler shift is not measurable.E) A) and C)
F) None of the above

Question 3

An M star is hotter than an O star.

Accepted Answer

A) True 
 B)False

Question 4

-In the light curve shown below,what is the period of the eclipsing binary?

Accepted Answer

A)  5 days
B)  32.5 days
C)  42.5 days
D)  50 daysE) All of the above
F) C) and D)

Question 5

The location of a star in the H-R diagram indicates its temperature and intrinsic brightness.

Accepted Answer

A) True 
 B)False

Question 6

What information can we get from eclipsing binaries that we cannot get from visual binaries?

Accepted Answer

The answer of What information can we get from eclipsing...

Question 7

-Use the H-R diagram to answer the following question: Which star in the diagram is most like the Sun?

Accepted Answer

A)  Alnilam
B)  Arcturus
C)  HR 5337
D)  Sirius BE) A) and D)
F) All of the above

Question 8

Which stars on the main sequence have the greatest mass?

Accepted Answer

A)  the spectral type M stars
B)  the spectral type O stars
C)  those that are located in the lower right of the H-R diagram
D)  those that are located in the lower left of the H-R diagramE) B) and D)
F) None of the above

Question 9

Which of the following can we NOT use to determine the surface temperature of a star?

Accepted Answer

A)  studying its continuous spectrum
B)  studying its line absorption spectrum
C)  measuring the star's luminosity and diameter
D)  measuring the star's parallaxE) B) and C)
F) A) and D)

Question 10

Which of the following kinds of stars best obey the mass-luminosity relation?

Accepted Answer

A)  main-sequence stars
B)  giant stars
C)  supergiant stars
D)  white dwarfsE) A) and D)
F) A) and C)

Question 11

In an H-R diagram,where are 90 percent of all the stars found?

Accepted Answer

A)  in the giant region
B)  in the supergiant region
C)  on the dwarf sequence
D)  on the main sequenceE) A) and B)
F) A) and C)

Question 12

Which star type in the Milky Way is likely to be most completely catalogued?

Accepted Answer

A)  Red main-sequence stars, because there are so many of them.
B)  Luminous stars, because they are bright and easy to find.
C)  Stars like the Sun, because the Sun is a typical star.
D)  White dwarf stars, because they are so old.E) A) and C)
F) C) and D)

Question 13

Describe the measurements needed to determine the orbit of a visual binary star.

Accepted Answer

The answer of Describe the measurements needed to determine the...

Question 14

-Look carefully at this diagram of a radial velocity curve for a spectroscopic binary.Which of the stars is most massive? ____________________

Accepted Answer

The answer of 
-Look carefully at this diagram of a...

Question 15

Why is it difficult to decide how common hot stars are?

Accepted Answer

Determining the prevalence of hot stars ...

Question 16

The table lists the spectral types for each of four stars.Which star in this table would have the highest surface temperature?

Accepted Answer

A)  α For
B)  o Cet
C)  ƴ Tri
D)    ξ \xi ξ  Per E) All of the above
F) A) and B)

Question 17

For stars on the main sequence,the luminosity can be estimated by the formula L = ____________________.

Accepted Answer

The answer of For stars on the main sequence,the luminosity...

Question 18

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18.The absolute visual magnitude of 75 Leo is ____________________.

Accepted Answer

The answer of The parallax of the star 75 Leo...

Question 19

What is the most accurate way to determine the surface temperature of a star?

Accepted Answer

A)  Study the pattern of absorption lines from various atoms.
B)  Study the relative intensities of light measured through different photometric filters.
C)  Study the peak wavelength of the star's continuum blackbody spectrum.
D)  Study the pattern of emission lines on the star's spectrum.E) A) and B)
F) A) and C)

Question 20

-On the H-R diagram,indicate the location of the white dwarf stars.

Accepted Answer

An elongated region should be ...

Exam 6: The Family of Stars

-Look carefully at this diagram of a radial velocity curve for a spectroscopic binary.Which of the stars is most massive? ____________________

Correct AnswerverifiedShow Answer

The location of a star in the H-R diagram indicates its temperature and intrinsic brightness.

Correct AnswerverifiedShow Answer

Which of the following can we NOT use to determine the surface temperature of a star?

Correct AnswerverifiedShow Answer

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18.The absolute visual magnitude of 75 Leo is ____________________.

Correct AnswerverifiedShow Answer

Describe the measurements needed to determine the orbit of a visual binary star.

Correct AnswerverifiedShow Answer

Which stars on the main sequence have the greatest mass?

Correct AnswerverifiedShow Answer

The table lists the spectral types for each of four stars.Which star in this table would have the highest surface temperature?

Correct AnswerverifiedShow Answer

-Use the H-R diagram to answer the following question: Which star in the diagram is most like the Sun?

Correct AnswerverifiedShow Answer

What is the most common kind of star? What measurements must be made to discover this information?

Correct AnswerAnswered by ExamLex AIThe most common kind of star in the univ...View AnswerShow Answer

-In the light curve shown below,what is the period of the eclipsing binary?

Correct AnswerverifiedShow Answer

What information can we get from eclipsing binaries that we cannot get from visual binaries?

Correct AnswerverifiedShow Answer

Which star type in the Milky Way is likely to be most completely catalogued?

Correct AnswerverifiedShow Answer

In an H-R diagram,where are 90 percent of all the stars found?

Correct AnswerverifiedShow Answer

-On the H-R diagram,indicate the location of the white dwarf stars.

Correct AnswerverifiedAn elongated region should be ...View AnswerShow Answer

What is the most accurate way to determine the surface temperature of a star?

Correct AnswerverifiedShow Answer

Why is it difficult to decide how common hot stars are?

Correct AnswerAnswered by ExamLex AIDetermining the prevalence of hot stars ...View AnswerShow Answer

Which of the following kinds of stars best obey the mass-luminosity relation?

Correct AnswerverifiedShow Answer

An M star is hotter than an O star.

Correct AnswerverifiedShow Answer

Why are spectroscopic binaries difficult to analyze?

Correct AnswerverifiedShow Answer

For stars on the main sequence,the luminosity can be estimated by the formula L = ____________________.

Correct AnswerverifiedShow Answer

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The most common kind of star in the univ...
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An elongated region should be ...
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Determining the prevalence of hot stars ...
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