Question 1

The slowing of clocks in strongly curved space time is known as

Accepted Answer

A) gravitational radiation. 
B) time dilation. 
C) gravitational curvature. 
D) gravitational redshift. 
E) hyperspace drag. 
A) gravitational radiation. 
B) time dilation. 
C) gravitational curvature. 
D) gravitational redshift. 
E) hyperspace drag.

Question 2

Which are compact objects

Accepted Answer

A) black holes 
B) neutron stars 
C) white dwarfs 
D) All of the other choices are correct. 
A) black holes 
B) neutron stars 
C) white dwarfs 
D) All of the other choices are correct.

Question 3

The above cartoon is of a neutron star with a strong magnetic field. We call this a pulsar planet.

Accepted Answer

A) True 
 B)False

Question 4

Complete the reaction: e + p → _______________; the reaction applies to ________________.

Accepted Answer

A) n, white dwarfs 
B) ν, neutron stars 
C) n + ν, white dwarfs 
D) n + ν, neutron stars 
A) n, white dwarfs 
B) ν, neutron stars 
C) n + ν, white dwarfs 
D) n + ν, neutron stars

Question 5

Which of the following objects is considered to possibly contain a black hole

Accepted Answer

A) the central star of the Crab nebula 
B) the Orion nebula. 
C) LMC X-3 
D) Algol 
E) PSR 1257+12 
A) the central star of the Crab nebula 
B) the Orion nebula. 
C) LMC X-3 
D) Algol 
E) PSR 1257+12

Question 6

When a star of mass comparable to the Sun dies it become a black hole.

Accepted Answer

A) True 
 B)False

Question 7

The first pulsar was discovered by _________ in November of 1967.

Accepted Answer

A) Jocelyn Bell 
B) Isaac Newton 
C) Albert Einstein 
D) Walter Baade 
E) Edwin Hubble 
A) Jocelyn Bell 
B) Isaac Newton 
C) Albert Einstein 
D) Walter Baade 
E) Edwin Hubble

Question 8

_________ occurs when light travels out of a gravitational field, loses energy, and its wavelength grows longer.

Accepted Answer

A) A gravitational blue shift 
B) The solar wind 
C) A gravitational redshift 
D) A X-ray burst 
E) A pulsar wind 
A) A gravitational blue shift 
B) The solar wind 
C) A gravitational redshift 
D) A X-ray burst 
E) A pulsar wind

Question 9

How can an old pulsar have a very short pulsar period, say less than 0.03 seconds

Accepted Answer

It now appears that the speedy pulsar is

Question 10

The above cartoon drawing is of a pulsar with its rotation axis aligned with it magnetic axis.

Accepted Answer

A) True 
 B)False

Question 11

The lighthouse in the following picture represents which model for which compact object

Accepted Answer

A) lighthouse, neutron star 
B) scientific, white dwarf 
C) Earth-centered, neutron star 
D) mathematical, Earth 
A) lighthouse, neutron star 
B) scientific, white dwarf 
C) Earth-centered, neutron star 
D) mathematical, Earth

Question 12

An object of zero radius is known as a __________________.

Accepted Answer

The answer of An object of zero radius is known...

Question 13

The search for black holes involves searching for

Accepted Answer

A) single stars that emit large amounts of X-rays. 
B) X-ray binaries where the compact companion has a mass in excess of 3   . 
C) large spherical regions from which no light is detected. 
D) pulsars with periods less than one millisecond. 
E) pulsars that are orbited by planets. 
A) single stars that emit large amounts of X-rays. 
B) X-ray binaries where the compact companion has a mass in excess of 3   . 
C) large spherical regions from which no light is detected. 
D) pulsars with periods less than one millisecond. 
E) pulsars that are orbited by planets.

Question 14

How fast does a pulsar initially spin

Accepted Answer

A) 10 times per second 
B) 1 time per second 
C) 100 times per second 
D) 1000 times per second 
A) 10 times per second 
B) 1 time per second 
C) 100 times per second 
D) 1000 times per second

Question 15

What happens when a core's density exceeds that which electron degeneracy pressure can support

Accepted Answer

A) The core collapses to a black hole. 
B) The core collapses to a neutron star. 
C) The core collapses to a white dwarf. 
D) The core collapses to a neutron star or a black hole. 
A) The core collapses to a black hole. 
B) The core collapses to a neutron star. 
C) The core collapses to a white dwarf. 
D) The core collapses to a neutron star or a black hole.

Question 16

We expect neutron stars to spin rapidly because they conserve angular momentum.

Accepted Answer

A) True 
 B)False

Question 17

To tell the difference between a neutron star and a black hole in an X-ray binary, we must find the temperature of the object.

Accepted Answer

A) True 
 B)False

Question 18

What happens when a core's mass is less than 3 solar masses but greater than 1.44 solar masses

Accepted Answer

A) Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrinos of which supply neutron degeneracy pressure to support the neutron star. 
B) Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrons of which supply neutron degeneracy pressure to support the neutron star. 
C) Electron degeneracy pressure supports the core of the white dwarf. 
D) Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrinos of which supply neutron degeneracy pressure to support the black hole star. 
A) Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrinos of which supply neutron degeneracy pressure to support the neutron star. 
B) Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrons of which supply neutron degeneracy pressure to support the neutron star. 
C) Electron degeneracy pressure supports the core of the white dwarf. 
D) Electron degeneracy pressure can no longer support the core and the electrons combine with the protons to generate neutrons and neutrinos, the neutrinos of which supply neutron degeneracy pressure to support the black hole star.

Question 19

What happens when a core's mass exceeds 3 solar masses and its density exceeds that which electron degeneracy pressure can support

Accepted Answer

A) The core collapses into a black hole. 
B) The core collapses into a neutron star. 
C) The core collapses into a white dwarf. 
D) The core collapses into a neutron star or a black hole. 
A) The core collapses into a black hole. 
B) The core collapses into a neutron star. 
C) The core collapses into a white dwarf. 
D) The core collapses into a neutron star or a black hole.

Question 20

Pulsars cannot be spinning white dwarfs because

Accepted Answer

A) white dwarfs are not that common. 
B) white dwarfs are not dense enough. 
C) white dwarfs do not have magnetic fields. 
D) a white dwarf spinning that fast would fly apart. 
E) All of the other choices are correct. 
A) white dwarfs are not that common. 
B) white dwarfs are not dense enough. 
C) white dwarfs do not have magnetic fields. 
D) a white dwarf spinning that fast would fly apart. 
E) All of the other choices are correct.

The slowing of clocks in strongly curved space time is known as

Which are compact objects

The above cartoon is of a neutron star with a strong magnetic field. We call this a pulsar planet.

Complete the reaction: e + p → _; the reaction applies to __.

Which of the following objects is considered to possibly contain a black hole

When a star of mass comparable to the Sun dies it become a black hole.

The first pulsar was discovered by _________ in November of 1967.

_________ occurs when light travels out of a gravitational field, loses energy, and its wavelength grows longer.

How can an old pulsar have a very short pulsar period, say less than 0.03 seconds

The above cartoon drawing is of a pulsar with its rotation axis aligned with it magnetic axis.

The lighthouse in the following picture represents which model for which compact object

An object of zero radius is known as a __________________.

The search for black holes involves searching for

How fast does a pulsar initially spin

What happens when a core's density exceeds that which electron degeneracy pressure can support

We expect neutron stars to spin rapidly because they conserve angular momentum.

To tell the difference between a neutron star and a black hole in an X-ray binary, we must find the temperature of the object.

What happens when a core's mass is less than 3 solar masses but greater than 1.44 solar masses

What happens when a core's mass exceeds 3 solar masses and its density exceeds that which electron degeneracy pressure can support

Pulsars cannot be spinning white dwarfs because

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 11: Neutron Stars and Black Holes

The slowing of clocks in strongly curved space time is known as

Which are compact objects

The above cartoon is of a neutron star with a strong magnetic field. We call this a pulsar planet.

Complete the reaction: e + p → _______________; the reaction applies to ________________.

Which of the following objects is considered to possibly contain a black hole

When a star of mass comparable to the Sun dies it become a black hole.

The first pulsar was discovered by _________ in November of 1967.

_________ occurs when light travels out of a gravitational field, loses energy, and its wavelength grows longer.

How can an old pulsar have a very short pulsar period, say less than 0.03 seconds

The above cartoon drawing is of a pulsar with its rotation axis aligned with it magnetic axis.

The lighthouse in the following picture represents which model for which compact object

An object of zero radius is known as a __________________.

The search for black holes involves searching for

How fast does a pulsar initially spin

What happens when a core's density exceeds that which electron degeneracy pressure can support

We expect neutron stars to spin rapidly because they conserve angular momentum.

To tell the difference between a neutron star and a black hole in an X-ray binary, we must find the temperature of the object.

What happens when a core's mass is less than 3 solar masses but greater than 1.44 solar masses

What happens when a core's mass exceeds 3 solar masses and its density exceeds that which electron degeneracy pressure can support

Pulsars cannot be spinning white dwarfs because

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Complete the reaction: e + p → _; the reaction applies to __.