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

A) an absorption spectrum B) a continuous spectrum C) an emission spectrum D) no radiation A) an absorption spectrum B) a continuous spectrum C) an emission spectrum D) no radiation

Exam 10: Measuring the Stars

Stars X and Y are 5 AU apart from each other.Star X is 4 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 41

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 42

In the quantum mechanical view of the atom,an electron is best thought of as:

(Multiple Choice)

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Question 43

A thin cloud of cool gas on top of a hotter blackbody will radiate an emission spectrum.

(True/False)

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Question 44

Which of the following properties is not plotted on the horizontal axis of an H-R diagram?

(Multiple Choice)

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Question 45

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

(Multiple Choice)

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Question 46

What spectral class is the Sun?

(Multiple Choice)

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Question 47

Stars are made mostly of:

(Multiple Choice)

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Question 48

The one property of a main-sequence star that determines all its other properties is its:

(Multiple Choice)

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Question 49

The star named Capella has an apparent magnitude of 0 while the star named Polaris has an apparent magnitude of 2,which means that Capella appears __________ Polaris in the night sky.

(Multiple Choice)

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Question 50

Mass solely determines the position of a star on the H-R diagram.

(True/False)

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Question 51

A star with the same luminosity as the Sun,but which is twice as hot,must be four times as big.

(True/False)

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Question 52

Eclipsing binary systems:

(Multiple Choice)

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Question 53

Using information from the figure below,explain why star 2 is the more massive star of the eclipsing binary pair?

(Essay)

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Question 54

A star emits:

(Multiple Choice)

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Question 55

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 0.3 AU then what are the masses of stars A and B?

(Multiple Choice)

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Question 56

The stars that have the largest radii are classified as supergiants.

(True/False)

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Question 57

Stars with a higher apparent brightness are necessarily closer to us than fainter stars.

(True/False)

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Question 58

A star classified as a K0III star is:

(Multiple Choice)

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Question 59

Examine the figure below.On a typical H-R diagram,where are main-sequence stars that have the coolest surface temperatures located?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 75

Stars X and Y are 5 AU apart from each other.Star X is 4 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 the quantum mechanical view of the atom,an electron is best thought of as:

A thin cloud of cool gas on top of a hotter blackbody will radiate an emission spectrum.

Which of the following properties is not plotted on the horizontal axis of an H-R diagram?

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

What spectral class is the Sun?

Stars are made mostly of:

The one property of a main-sequence star that determines all its other properties is its:

The star named Capella has an apparent magnitude of 0 while the star named Polaris has an apparent magnitude of 2,which means that Capella appears __________ Polaris in the night sky.

Mass solely determines the position of a star on the H-R diagram.

A star with the same luminosity as the Sun,but which is twice as hot,must be four times as big.

Eclipsing binary systems:

Using information from the figure below,explain why star 2 is the more massive star of the eclipsing binary pair?

A star emits:

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 0.3 AU then what are the masses of stars A and B?

The stars that have the largest radii are classified as supergiants.

Stars with a higher apparent brightness are necessarily closer to us than fainter stars.

A star classified as a K0III star is:

Examine the figure below.On a typical H-R diagram,where are main-sequence stars that have the coolest surface temperatures located?

Our Place in the Universe

Patterns in the Skymotions of Earth

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, Earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Our Star: The Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

The Expansion of Space

The Realm of the Galaxies

Our Galaxy: The Milky Way

Modern Cosmology and the Origin of Structure

Life in the Universe

Filters

Exam 10: Measuring the Stars

Stars X and Y are 5 AU apart from each other.Star X is 4 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 the quantum mechanical view of the atom,an electron is best thought of as:

A thin cloud of cool gas on top of a hotter blackbody will radiate an emission spectrum.

Which of the following properties is not plotted on the horizontal axis of an H-R diagram?

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

What spectral class is the Sun?

Stars are made mostly of:

The one property of a main-sequence star that determines all its other properties is its:

The star named Capella has an apparent magnitude of 0 while the star named Polaris has an apparent magnitude of 2,which means that Capella appears __________ Polaris in the night sky.

Mass solely determines the position of a star on the H-R diagram.

A star with the same luminosity as the Sun,but which is twice as hot,must be four times as big.

Eclipsing binary systems:

Using information from the figure below,explain why star 2 is the more massive star of the eclipsing binary pair?

A star emits:

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 0.3 AU then what are the masses of stars A and B?

The stars that have the largest radii are classified as supergiants.

Stars with a higher apparent brightness are necessarily closer to us than fainter stars.

A star classified as a K0III star is:

Examine the figure below.On a typical H-R diagram,where are main-sequence stars that have the coolest surface temperatures located?

Our Place in the Universe

Patterns in the Skymotions of Earth

Laws of Motion

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, Earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Our Star: The Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

The Expansion of Space

The Realm of the Galaxies

Our Galaxy: The Milky Way

Modern Cosmology and the Origin of Structure

Life in the Universe

Filters

Stars X and Y are 5 AU apart from each other.Star X is 4 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.