AST 105 Exam 2 Ch 14
Last-Minute Lifesaver – Practice Exams & Answers
3 - At peak brightness, the white dwarf supernova is approximately __________ times as
luminous as the massive star supernova at its peak brightness.
1% - For the white dwarf supernova, the luminosity 175 days after it reaches peak brightness is
about __________ of the luminosity at peak brightness.
30 days - Approximately how many days does it take for a white dwarf supernova to decline to
10% of its peak brightness?
100 days - Approximately how many days does it take for a massive star supernova to decline to
10% of its peak brightness?
300 days - Approximately how many days does it take for a massive star supernova to decline to
1% of its peak brightness?
subatomic particles are packed as tightly as the laws of quantum mechanics allow - Degenearcy
pressure arises when ________.
the merger of two black holes - Gravitational waves were first detected directly in 2015.
According to models, the source of these gravitational waves was __________.
electron degeneracy pressure - A white dwarf can remain stable in size because of
________________________________
singularity - The ___________________ is the place to which all of a black hole's mass is in
principle located within the black hole.
, accretion disk - A(n) ___________________ can form around a white dwarf, neutron star, or
black hole in a binary system
event horizon - The ___________________ marks the boundary between the inside and outside
of a black hole.
neutron degeneracy pressure - A neutron star can remain stable in size because of
_____________________________
nova - A(n) ____________ occurs when fusion ignites on the surface of a white dwarf.
pulsar - A(n) ___________ is rapidly rotating neutron star.
what most stars become when they die - A white dwarf is _________.
as massive as the Sun but only about as large in size as Earth - A typical white dwarf is
_________.
about 5 pounds - If you had something the size of a sugar cube that was made of white dwarf
matter, it would weigh _________.
about 1.4 times the mass of our Sun - The maximum mass of a white dwarf is _________.
A disk of hot gas swirling rapidly around a white dwarf, neutron star, or black hole - What is an
accretion disk?
An explosion on the surface of a white dwarf in a close binary system - According to our modern
understanding, what is a nova?
Last-Minute Lifesaver – Practice Exams & Answers
3 - At peak brightness, the white dwarf supernova is approximately __________ times as
luminous as the massive star supernova at its peak brightness.
1% - For the white dwarf supernova, the luminosity 175 days after it reaches peak brightness is
about __________ of the luminosity at peak brightness.
30 days - Approximately how many days does it take for a white dwarf supernova to decline to
10% of its peak brightness?
100 days - Approximately how many days does it take for a massive star supernova to decline to
10% of its peak brightness?
300 days - Approximately how many days does it take for a massive star supernova to decline to
1% of its peak brightness?
subatomic particles are packed as tightly as the laws of quantum mechanics allow - Degenearcy
pressure arises when ________.
the merger of two black holes - Gravitational waves were first detected directly in 2015.
According to models, the source of these gravitational waves was __________.
electron degeneracy pressure - A white dwarf can remain stable in size because of
________________________________
singularity - The ___________________ is the place to which all of a black hole's mass is in
principle located within the black hole.
, accretion disk - A(n) ___________________ can form around a white dwarf, neutron star, or
black hole in a binary system
event horizon - The ___________________ marks the boundary between the inside and outside
of a black hole.
neutron degeneracy pressure - A neutron star can remain stable in size because of
_____________________________
nova - A(n) ____________ occurs when fusion ignites on the surface of a white dwarf.
pulsar - A(n) ___________ is rapidly rotating neutron star.
what most stars become when they die - A white dwarf is _________.
as massive as the Sun but only about as large in size as Earth - A typical white dwarf is
_________.
about 5 pounds - If you had something the size of a sugar cube that was made of white dwarf
matter, it would weigh _________.
about 1.4 times the mass of our Sun - The maximum mass of a white dwarf is _________.
A disk of hot gas swirling rapidly around a white dwarf, neutron star, or black hole - What is an
accretion disk?
An explosion on the surface of a white dwarf in a close binary system - According to our modern
understanding, what is a nova?
