Question 1

Gamma ray bursts were first recorded while trying to detect _____.

Accepted Answer

A)  solar flares 
B)  the Aurora Borealis 
C)  nuclear reactor accidents 
D)  nuclear tests 
E)  particle accelerator leakage 
A)  solar flares 
B)  the Aurora Borealis 
C)  nuclear reactor accidents 
D)  nuclear tests 
E)  particle accelerator leakage

Question 2

The mass of a black hole concentrated in an infinitesimally small volume with zero radius, is known as a(n) _______________.

Accepted Answer

The answer of The mass of a black hole concentrated...

Question 3

The oldest pulsars are billions of years old.

Accepted Answer

A) True 
 B)False

Question 4

A black hole is _____.

Accepted Answer

A)  an object so dense that light cannot escape its surface 
B)  a neutron star that has exceeded the Chandrasekhar limit 
C)  a theoretical model that has never been observed 
D)  an observed object that is not well understood 
E)  the result of a neutron star merger 
A)  an object so dense that light cannot escape its surface 
B)  a neutron star that has exceeded the Chandrasekhar limit 
C)  a theoretical model that has never been observed 
D)  an observed object that is not well understood 
E)  the result of a neutron star merger

Question 5

Any compact object with a mass greater than _______________ solar masses must form a black hole.

Accepted Answer

The answer of Any compact object with a mass greater...

Question 6

What prediction does general relativity make for pulsars in a binary system?

Accepted Answer

According to Einstein's theory of genera

Question 7

Most of the energy emitted by a pulsar _____.

Accepted Answer

A)  is carried away as a 'pulsar wind' of high-speed atomic particles 
B)  produces strong gravitational waves that radiate for several light years 
C)  ionizes the supernova remnant around the pulsar 
D)  is in the form of neutrinos 
E)  is carried away by the high-energy beam emerging from the poles of the pulsar 
A)  is carried away as a 'pulsar wind' of high-speed atomic particles 
B)  produces strong gravitational waves that radiate for several light years 
C)  ionizes the supernova remnant around the pulsar 
D)  is in the form of neutrinos 
E)  is carried away by the high-energy beam emerging from the poles of the pulsar

Question 8

A magnetar is a type of ____.

Accepted Answer

A)  hypernova 
B)  neutron star 
C)  black hole 
D)  jet 
E)  X-ray burster 
A)  hypernova 
B)  neutron star 
C)  black hole 
D)  jet 
E)  X-ray burster

Question 9

The event horizon is located at the Schwarzschild radius.

Accepted Answer

A) True 
 B)False

Question 10

Jets from compact objects are explained by the effect of _____.

Accepted Answer

A)  magnetic fields 
B)  gravitational waves 
C)  angular momentum 
D)  mass transfer 
E)  pulsar winds 
A)  magnetic fields 
B)  gravitational waves 
C)  angular momentum 
D)  mass transfer 
E)  pulsar winds

Question 11

Neutron stars must ____.

Accepted Answer

A)  rotate very rapidly 
B)  be very luminous 
C)  have weak magnetic fields 
D)  have a mass greater than three solar masses 
E)  have about the same surface temperature as the star that created them 
A)  rotate very rapidly 
B)  be very luminous 
C)  have weak magnetic fields 
D)  have a mass greater than three solar masses 
E)  have about the same surface temperature as the star that created them

Question 12

What are the physical properties neutron stars, and how does theory predict these properties?

Accepted Answer

Neutron stars have hot surfaces, spin ra

Question 13

A compact object with a mass of 1.1 solar masses could ____.

Accepted Answer

A)  be a neutron star or a black hole 
B)  be a neutron star, but not a black hole 
C)  be a black hole, but not a neutron star 
D)  not be a black hole or neutron star 
A)  be a neutron star or a black hole 
B)  be a neutron star, but not a black hole 
C)  be a black hole, but not a neutron star 
D)  not be a black hole or neutron star

Question 14

A star with a mass of 10 to 20 solar masses will produce a(n) _______________ remnant after a supernova explosion.

Accepted Answer

The answer of A star with a mass of 10...

Question 15

Jets are composed of matter and antimatter produced in the poles of a compact object.

Accepted Answer

A) True 
 B)False

Question 16

A supermassive, rapidly rotating star may generate a gamma-ray burst in a(n) _______________ eruption.

Accepted Answer

hypernova,

Question 17

Astronauts approaching a black hole would observe that _____.

Accepted Answer

A)  time appears to slows down for them 
B)  time appears to speed up for external observers 
C)  they become squashed flat - their heads and feet are pushed together by gravitational tides 
D)  they become stretched thin - their heads and feet are pulled apart by gravitational tides 
E)  nothing appears to change 
A)  time appears to slows down for them 
B)  time appears to speed up for external observers 
C)  they become squashed flat - their heads and feet are pushed together by gravitational tides 
D)  they become stretched thin - their heads and feet are pulled apart by gravitational tides 
E)  nothing appears to change

Question 18

All supernova remnants contain pulsars.

Accepted Answer

A) True 
 B)False

Question 19

Gamma ray bursts _____.

Accepted Answer

A)  last minutes to hours 
B)  are detected primarily in the disk of the galaxy 
C)  occur without warning 
D)  are not associated with any observable event 
E)  are detected only a few times per year 
A)  last minutes to hours 
B)  are detected primarily in the disk of the galaxy 
C)  occur without warning 
D)  are not associated with any observable event 
E)  are detected only a few times per year

Question 20

Matter falling onto a compact object, such as a neutron star or black hole,forms a(n):

Accepted Answer

A)  accretion disk 
B)  binary star 
C)  gamma-ray burst 
D)  pulsar 
E)  magnetar 
A)  accretion disk 
B)  binary star 
C)  gamma-ray burst 
D)  pulsar 
E)  magnetar

Exam 14: Neutron Stars and Black Holes

Gamma ray bursts were first recorded while trying to detect _____.

The mass of a black hole concentrated in an infinitesimally small volume with zero radius, is known as a(n) _______________.

The oldest pulsars are billions of years old.

A black hole is _____.

Any compact object with a mass greater than _______________ solar masses must form a black hole.

What prediction does general relativity make for pulsars in a binary system?

Most of the energy emitted by a pulsar _____.

A magnetar is a type of ____.

The event horizon is located at the Schwarzschild radius.

Jets from compact objects are explained by the effect of _____.

Neutron stars must ____.

What are the physical properties neutron stars, and how does theory predict these properties?

A compact object with a mass of 1.1 solar masses could ____.

A star with a mass of 10 to 20 solar masses will produce a(n) _______________ remnant after a supernova explosion.

Jets are composed of matter and antimatter produced in the poles of a compact object.

A supermassive, rapidly rotating star may generate a gamma-ray burst in a(n) _______________ eruption.

Astronauts approaching a black hole would observe that _____.

All supernova remnants contain pulsars.

Gamma ray bursts _____.

Matter falling onto a compact object, such as a neutron star or black hole,forms a(n):

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