You observe a binary star system and find that star 1 has a velocity of 20 m/s while star 2 has a velocity of 40 m/s.What is the ratio of masses of the two stars (M1/M2)? If you find that the separation of the two stars is 0.5 AU and the orbital period is 70 days,then what are the individual masses of the two stars?

The ratio of masses of stars in a binary

Exam 13: Taking the Measure of Stars

Stars X and Y are 5 AU apart from each other.Star X is four times as massive as star Y.The center of mass of this system is _ AU away from star X and _ AU away from star Y.

(Multiple Choice)

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Question 21

Star A is a red star.Star B is a blue star.You are able to determine that both stars are the same size.Which star is brighter?

(Multiple Choice)

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Question 22

You discover a binary star system in which star A has a velocity of 10 km/s and star B has a velocity of 30 km/s.If you study the system further and find out that the orbital period is 30 days and the orbital separation is a constant 0.3 AU,then what are the masses of stars A and B?

(Multiple Choice)

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Question 23

What is the main property of a main-sequence star that determines all its other properties?

(Essay)

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Question 24

What is the physical difference between an eclipsing binary system and a spectroscopic binary system?

(Essay)

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Question 25

How is the distance to a star related to its parallax?

(Multiple Choice)

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Question 26

A star classified as a K0III star is:

(Multiple Choice)

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Question 27

Stars A and B appear equally bright,but star A is twice as far away from us as star B.Which of the following is true?

(Multiple Choice)

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Question 28

You observe a binary star system and find that star 1 has a velocity of 20 m/s while star 2 has a velocity of 40 m/s.What is the ratio of masses of the two stars (M₁/M₂)? If you find that the separation of the two stars is 0.5 AU and the orbital period is 70 days,then what are the individual masses of the two stars?

(Essay)

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Question 29

The habitable zone for the Sun covers the area that is between _________ from the Sun.

(Multiple Choice)

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Question 30

Two main-sequence stars have the same temperature.If star A is four times brighter than star B,then:

(Multiple Choice)

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Question 31

Stars that have spectral type B are lower in temperature than spectral type M.

(True/False)

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Question 32

With today's advanced technology,we can measure the parallax for any star inside the Milky Way.

(True/False)

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Question 33

In a binary star system that contains stars with 2M_☉ and 1M_☉,the velocity of the 2M_☉ star will be _________ times the velocity of the 1M_☉ star.

(Multiple Choice)

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Question 34

Rigel is a star with an apparent magnitude of +0.1,and Betelgeuse is a star with an apparent magnitude of +0.4.Which star appears brighter,and what is the ratio of their brightnesses?

(Essay)

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Question 35

Star A emits its peak energy at a wavelength of 500 nm,and star B emits its peak energy at a wavelength of 750 nm.If both stars have the same radii,which star is hotter and by how much?

(Essay)

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Question 36

You observe a binary star system and find that star 1 has a velocity of 10 m/s while star 2 has a velocity of 35 m/s.What is the ratio of masses of the two stars (M₁/M₂)?

(Essay)

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Question 37

If star A has a temperature that is twice as hot as the Sun but has the same luminosity as the Sun,the diameter of star A must be _________ times the diameter of the Sun.

(Multiple Choice)

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Question 38

Which of the following properties are NOT useful in determining the masses of stars in a typical binary system?

(Multiple Choice)

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Question 39

A parsec is a unit of time.

(True/False)

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Question 40

Showing 21 - 40 of 83

Exam 13: Taking the Measure of Stars

Stars X and Y are 5 AU apart from each other.Star X is four times as massive as star Y.The center of mass of this system is _________ AU away from star X and _________ AU away from star Y.

Star A is a red star.Star B is a blue star.You are able to determine that both stars are the same size.Which star is brighter?

You discover a binary star system in which star A has a velocity of 10 km/s and star B has a velocity of 30 km/s.If you study the system further and find out that the orbital period is 30 days and the orbital separation is a constant 0.3 AU,then what are the masses of stars A and B?

What is the main property of a main-sequence star that determines all its other properties?

What is the physical difference between an eclipsing binary system and a spectroscopic binary system?

How is the distance to a star related to its parallax?

A star classified as a K0III star is:

Stars A and B appear equally bright,but star A is twice as far away from us as star B.Which of the following is true?

The habitable zone for the Sun covers the area that is between _________ from the Sun.

Two main-sequence stars have the same temperature.If star A is four times brighter than star B,then:

Stars that have spectral type B are lower in temperature than spectral type M.

With today's advanced technology,we can measure the parallax for any star inside the Milky Way.

In a binary star system that contains stars with 2M☉ and 1M☉,the velocity of the 2M☉ star will be _________ times the velocity of the 1M☉ star.

Rigel is a star with an apparent magnitude of +0.1,and Betelgeuse is a star with an apparent magnitude of +0.4.Which star appears brighter,and what is the ratio of their brightnesses?

Star A emits its peak energy at a wavelength of 500 nm,and star B emits its peak energy at a wavelength of 750 nm.If both stars have the same radii,which star is hotter and by how much?

You observe a binary star system and find that star 1 has a velocity of 10 m/s while star 2 has a velocity of 35 m/s.What is the ratio of masses of the two stars (M1/M2)?

If star A has a temperature that is twice as hot as the Sun but has the same luminosity as the Sun,the diameter of star A must be _________ times the diameter of the Sun.

Which of the following properties are NOT useful in determining the masses of stars in a typical binary system?

A parsec is a unit of time.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Motion of Astronomical Bodies

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

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Stars X and Y are 5 AU apart from each other.Star X is four times as massive as star Y.The center of mass of this system is _ AU away from star X and _ AU away from star Y.

In a binary star system that contains stars with 2M_☉ and 1M_☉,the velocity of the 2M_☉ star will be _________ times the velocity of the 1M_☉ star.

You observe a binary star system and find that star 1 has a velocity of 10 m/s while star 2 has a velocity of 35 m/s.What is the ratio of masses of the two stars (M₁/M₂)?