21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 14QP
To determine
Why some black holes flickering X-ray sources.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
An isolated black hole in space would be difficult to detect because
a.
there would be no light source nearby.
b.
it would not be rotating rapidly.
c.
it would be stationary.
d.
very little matter would be falling into it.
e.
there would be very few stars behind it whose light it could block out.
In order to form a black hole, a star must be about how much more massive than our Sun?
a.
Fifty times as massive
b.
Ten times as massive
c.
Twice as massive
d.
Twenty times as massive
e.
It actually must be less massive than our Sun
The search for black holes involves searching for
a.
single stars that emit large numbers of X rays.
b.
X ray binaries where the compact companion has a mass in excess of 3 M.
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.
Chapter 18 Solutions
21st Century Astronomy
Ch. 18.1 - Prob. 18.1CYUCh. 18.2 - Prob. 18.2CYUCh. 18.3 - Prob. 18.3CYUCh. 18.4 - Prob. 18.4CYUCh. 18 - Prob. 1QPCh. 18 - Prob. 2QPCh. 18 - Prob. 3QPCh. 18 - Prob. 4QPCh. 18 - Prob. 5QPCh. 18 - Prob. 6QP
Ch. 18 - Prob. 7QPCh. 18 - Prob. 8QPCh. 18 - Prob. 9QPCh. 18 - Prob. 10QPCh. 18 - Prob. 11QPCh. 18 - Prob. 12QPCh. 18 - Prob. 13QPCh. 18 - Prob. 14QPCh. 18 - Prob. 15QPCh. 18 - Prob. 16QPCh. 18 - Prob. 17QPCh. 18 - Prob. 18QPCh. 18 - Prob. 19QPCh. 18 - Prob. 20QPCh. 18 - Prob. 21QPCh. 18 - Prob. 22QPCh. 18 - Prob. 23QPCh. 18 - Prob. 24QPCh. 18 - Prob. 25QPCh. 18 - Prob. 26QPCh. 18 - Prob. 27QPCh. 18 - Prob. 28QPCh. 18 - Prob. 29QPCh. 18 - Prob. 30QPCh. 18 - Prob. 31QPCh. 18 - Prob. 32QPCh. 18 - Prob. 33QPCh. 18 - Prob. 34QPCh. 18 - Prob. 35QPCh. 18 - Prob. 36QPCh. 18 - Prob. 37QPCh. 18 - Prob. 38QPCh. 18 - Prob. 39QPCh. 18 - Prob. 40QPCh. 18 - Prob. 41QPCh. 18 - Prob. 42QPCh. 18 - Prob. 43QPCh. 18 - Prob. 44QPCh. 18 - Prob. 45QP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Einstein said that gravity exists because: * A. massive objects warp space. B. of the existence of black holes. C. massive objects attract one another. D. light moves randomly throughout the universe. How do scientists / astronomers spot a black hole? * A. by using gamma rays and x-rays to detect high energy sources B. by using radioactive waves to detect high energy sources C. By using high energy to detect gamma rays and x-rays D. By using massive telescopes to detect gamma ray If you place your index just in front of you and try to look at it with you right eye open and your left eye close, then look at it with your left eye open and right eye close this time. You will notice that there is a slight change of the position of your index finger. What concept is applied how astronomers were able to measure the distance of heavenly bodies from the Earth? * A. Cosmic distance ladder B. Parallax C. Luminosity…arrow_forwardSuppose you drop a clock toward a black hole. As you look at the clock from a high orbit, what will you notice? Time on the clock will run faster as it approaches the black hole, and light from the clock A. will be increasingly blueshifted. B. The clock will fall toward the black hole at a steady rate, so that you'll see it plunge through the event horizon within just a few minutes. C. The clock will fall faster and faster, reaching the speed of light as it crosses the event horizon. D. Time on the clock will run slower as it approaches the black hole, and light from the clock will be increasingly redshifted.arrow_forwardThe primordial background radiation is observable primarily at a. radio wavelengths. b. ultraviolet wavelengths. c. X-ray wavelengths. d. gamma ray wavelengths.arrow_forward
- Which statement about a rotating black hole is correct? O a. The black hole develops an ergosphere, also known as the ring of fire. O b. Inside the ergosphere, it is possible to use some of the black hole's rotational kinetic energy as an energy source. O c. The black hole's ergosphere is a location where photons can have stable orbits around the black hole. O d. The black hole begins to emit Hawking radiation when it begins to rotate. O e. The ergosphere is another name for the inner event horizon.arrow_forwardHow do scientists / astronomers spot a black hole? * A. by using gamma rays and x-rays to detect high energy sources B. by using radioactive waves to detect high energy sources C. By using high energy to detect gamma rays and x-rays D. By using massive telescopes to detect gamma rayarrow_forwardIf a star is to eventually form a stellar black hole at any point in its life cycle what must happen? A. Gravity must be strong enough to compress all its material to be smaller than its schwartzchild radius B. it must pass by a supermassive black hole and tidal forces will do the rest C. Gravity must expand it so it can over power the nuclear forces that compress it and keep it from exploding by giving off all its heat D. A star will always have the same mass and radius and the only black holes that exist are ones that have existed shortly after the big bangarrow_forward
- 2. What is the best way to stop being pulled into a black hole? a.) Fire rockets continuously. b.) Invent anti-gravity. c.) Go into orbit, rely on centrifugal force. d.) Reduce the mass of the ship by throwing almost everything overboard. e.) Fall into the black hole and get frozen at its horizon.arrow_forwardThe peculiar system SS 433 I. is emitting beams of energy and matter. II. is producing a spectrum with both a redshift and a blueshift. III. probably contains an accretion disk. IV. is the result of a planetary nebula. a. I b. III c. II & III d. I, II, & III e. I, II, III, & IVarrow_forwardWhy don’t all supernova remnants contain pulsars? a. All supernova remnants do contain pulsars. b. Some supernova explosions form white dwarfs instead of the neutron stars necessary for pulsars. c. Pulsars slow down and quit producing the pulses before the supernova remnant dissipates. d. The pulsar may be tipped so that the beams do not sweep past Earth. e. b and carrow_forward
- Black hole candidates are detectable by their accretion disks producing mainly what type of light? a. infrared light b. ultraviolet light c. X rays d. gamma raysarrow_forwardWhat makes us think that the star system Cygnus X-1 contains a black hole? A, It emits X rays characteristic of an accretion disk, but the unseen star in the system is too massive to be a neutron star. B. No light is emitted from this star system, so it must contain a black hole. C. The fact that we see strong X-ray emission tells us that the system must contain a black hole. D.Cygnus X-1 is a powerful X-ray burster, so it must contain a black hole.arrow_forwardIn 1998, it was announced that the expansion of the universe is accelerating. What does this imply from the perspective of the big bang? a. A force exists that we knew nothing about causes the expansion. b. The universe must be closed. c. The universe is finite. d. The amount of dark matter must be far less than the amount of normal matter. e. The universe must be infinitely old.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning