Cosmic Perspective Fundamentals
3rd Edition
ISBN: 9780134988504
Author: Bennett, Jeffrey O., Donahue, M. (megan), SCHNEIDER, Nicholas, Voit, Mark
Publisher: Pearson,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 10, Problem 10QQ
Choose the best answer to each of the following. Explain your reasoning.
What makes astronomers think that Cygnus x-1 contains a black hole? (a) We can directly observe that one member of the system emits no light. (b) The unseen object orbited by a luminous star is too massive to be a neutron star. (c) The strong x-ray emission from the system means it must contain a black hole.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Using MBH
=
6.6 × 10 Mo, calculate the below.
a. Find radius of the Schwarzschild sphere (Schwarzschild radius Rs). You
can calculated from the appropriate formula or just use the fact that for
an object of 1 solar mass Rs = 3 km.
b. Express Rs in km, in AU, in parsecs.
c. Using the distance to M87 and your result above, find angular radius of
the SMBH (Schwarzschild radius). Express it in arcseconds (") and micro-
arcseconds (pas)
d. Take the radius of Pluto's orbit equal to 40 AU and find its angular size
(in micro-arcseconds, pas) at the distance of M87.
Please do not give solution in image formate thanku
Q:
You’ve just discovered another new X-ray binary, which we will call Hyp-X2 (“Hyp” for hypothetical). The system Hyp-X2 contains a bright, G2 main-sequence star orbiting an unseen companion. The separation of the stars is estimated to be 12 million kilometers, and the orbital period of the visible star is 5 days.
Use Newton’s version of Kepler’s third law to calculate the sum of the masses of the two stars in the system.
a)Express your answer in kilograms to two significant figures.
b) Give your answer from the previous part in solar masses. ( Msun= 2.0 x 10 /30 kg). Express your answer as a multiple of sun’s mass to two significant figures.
C) Determine the mass of the unseen companion. ( Hint: A G2 main-sequence star has a mass of 1 Msun.) Express your answer as a multiple of sun’s mass to two significant figures.
The previous answer was not correct, please help me
Post Test
I. Multiple Choice: Choose the letter of the correct answer
1. A space probe is drifting to the right at n constant velocity in deep interstellar
space far from any influence due to planets and atare-with its rockets off. If two
rocket thrusters both turn on simultaneously exerting identical forces leftward and
rightward in the directions shown, what would
happen to the motion of the rocket?
The space probe would continue with
constant velocity.
b. The space probe would speed up.
c. The space probe would slow down and
eventually stop
d. The space probe would immediately stop.
Space
cable
2. An elevator is being pulled upward at a constant velocity by a
cable as seen in the diagram. While the elevator is moving upward
at constant velocity, how does the magnitude of the upward force
exerted on the elevator by the cable
elevator
a. F. is greater than F
b. Fe is equa
o Fg
c. F. is smaller than Fk
d. F. could be larger or smaller than F.
3. A space probe is drifting to the right…
Chapter 10 Solutions
Cosmic Perspective Fundamentals
Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Prob. 6QQCh. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....
Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Choose the best answer to each of the following....Ch. 10 - Explain all answers clearly, with complete...Ch. 10 - Explain all answers clearly, with complete...Ch. 10 - Prob. 15SEQCh. 10 - Prob. 16SEQCh. 10 - Prob. 17SEQCh. 10 - Prob. 18SEQCh. 10 - Prob. 19SEQCh. 10 - Explain all answers clearly, with complete...Ch. 10 - Explain all answers clearly, with complete...Ch. 10 - Prob. 22SEQ
Additional Science Textbook Solutions
Find more solutions based on key concepts
Can two equipotential lines cross? Explain.
Physics for Scientists and Engineers with Modern Physics
39. Two identical loudspeakers separated by distance d emit 170Hz sound waves along the x-axis. As you walk alo...
College Physics: A Strategic Approach (4th Edition)
The term super-Earth means a planet that is (a) the size of Earth but with more water; (b) larger than Earth bu...
Life in the Universe (4th Edition)
24.4 Thin-film interference
20. * Representing thin-film interference (a) Draw a ray diagram for a laser beam ...
College Physics
26. 16 lb = _________ N
Applied Physics (11th Edition)
47(II) What gauge pressure in the water pipes is necessary if a fire hose is to spray water to a height of 16 m...
Physics: Principles with Applications
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
- Solution from part A: E=-KE = PE/2 Solution from part B: =3/2kt a. (NOTE: Treat the cloud as two equal masses interacting gravitationally across a distance equal to the radius of the cloud.) Use your result from part a to write down the condition for gravitational collapse in terms of the kinetic and potential energies (NOTE: This condition is an INEQUALITY) b. Use your result from part b in order to replace the kinetic energy with its temperature equivalent in your expression for the collapse condition. c. Solve the expression in ii above for the mass.arrow_forwardWrite a CR for the solved problem. A example of one is attached as well. The problem about the ROCK is the example CR. The problem you ARE writing a CR for is 5x^2-8x=3. Instructions below. For the CR's, claim you should answer the question of , do you get 2 real solutions, 1 real solution, or 2 complex solutions? For your reasoning you should explain how you know. Use the example attached to help you answer. hints: that plus minus sign means there are two answers. If the number under the square root is positive, you have two real solutions. If the number is negative you have two complex solutions. If the number is 0 under the square root you have 1 real number solution.arrow_forwardWhite Dwarf Size II. The white dwarf, Sirius B, contains 0.98 solar mass, and its density is about 2 x 106 g/cm?. Find the radius of the white dwarf in km to three significant digits. (Hint: Density = mass/volume, and the volume of a 4 sphere is Tr.) 3 km Compare your answer with the radii of the planets listed in the Table A-10. Which planet is this white dwarf is closely equal to in size? I Table A-10 I Properties of the Planets ORBITAL PROPERTIES Semimajor Axis (a) Orbital Period (P) Average Orbital Velocity (km/s) Orbital Inclination Planet (AU) (106 km) (v) (days) Eccentricity to Ecliptic Mercury 0.387 57.9 0.241 88.0 47.9 0.206 7.0° Venus 0.723 108 0.615 224.7 35.0 0.007 3.4° Earth 1.00 150 1.00 365.3 29.8 0.017 Mars 1.52 228 1.88 687.0 24.1 0.093 1.8° Jupiter 5.20 779 11.9 4332 13.1 0.049 1.30 Saturn 9.58 1433 29.5 10,759 9.7 0.056 2.5° 30,799 60,190 Uranus 19.23 2877 84.3 6.8 0.044 0.8° Neptune * By definition. 30.10 4503 164.8 5.4 0.011 1.8° PHYSICAL PROPERTIES (Earth = e)…arrow_forward
- Which of the following most correctly explains why we have not yet observed any white dwarfs derived from M stars: Group of answer choices Most M stars end up as neutron stars or black holes. The lifetime of M stars is longer than the age of the universe. Most M stars are located near the edge of the universe, beyond the visible horizon. Most M stars are members of a binary system, and the white dwarf would be obscured by the glare of the more massive companion. White dwarfs are too dim to be observed with currently available techniques.arrow_forwardDirection: Solve the problem by showing your detailed solution. Activity #1.1 Problem Solver Direction: Solve the problem by showing your detailed solution. 1 NASA is expected to send a 2600-kg satellite 450 km above the earth's surface. la) What is its radius? (b) What speed will it have? (Hint: Earth's mass is 5.97 x 1024 kg)arrow_forwardPlease answer the LAST THREE QUESTIONS USING THE VALUES PROVIDED. PLEASE DO NOT SKIP ANY STEPS AND COMPLETELY EXPLAIN YOUR ANSWER. I have submitted this question now FOUR times and have gotten different answers each time. Please make sure to answer ALL question in terms of AU where appropriate!! Please double check your work, and please make sure you fully undrestand the question before you undertake the problem. For the given black hole, its Schwarzschild radius is Rs=2.94814×109 m perihelion =0.3941 AU aphelion = 0.4927 AU The semi-major is calculated using the formula a = (0.492+0.3942)/2 a = 0.443 AUarrow_forward
- Part A What was the distance between the points that would someday become, respectively, the center of the Milky Way Galaxy and the center of the Virgo Cluster at the time of decoupling? (The present separation is 18 Mpc.) Express your answer using two significant figures. 1ΨΕΙ ΑΣΦ ? Request Aswer Submit kpearrow_forwardFor each of the following parts, find the most possible type of object by considering the descriptions, and explain your answer. Each part is independent. The possible types are red giant, galaxy, planetary system, planet, dwarf planet, red dwarf, white dwarf, brown dwarf, satellite, asteroid, comet, protostar 2 star, star cluster, galaxy cluster, supercluster, emission nebula, reflection nebula, dark nebula (a) This object moves around the Sun. The nearest distance to the Sun is 0.5 AU, and the farthest distance from the Sun is 1000 AU. (b) This object is red in colour. The density is much lower than that of a star. (c) The mass of this object is the same as that of the Sun. It does not fuse hydrogen. (d) This object moves in a circular orbit about the Sun. Its orbit is between those of Mars and Jupiter. It is round in shape. (e) This object burns hydrogen in a region surrounding its helium core.arrow_forwardChoose the correct statements from the following list referring to white dwarfs. (Give ALL correct answers, i.e., B, AC, BCD...) A) The pressure that balances gravity in a white dwarf is called degenerate electron pressure. B) The power source of white dwarfs is left-over heat. C) White dwarfs cool slowly because they are small and eventually fade-out to become black dwarfs. D) White dwarfs with mass greater than 1.4 times the Sun's mass cannot exist. E) Stars with a mass like the Sun will end up as a white dwarf star. F) White dwarfs are less dense than red giants. G) White dwarfs are the coolest main sequence stars.arrow_forward
- Based on what you learned about stellar evolution, select all of the correct statements from the following list. 1. The period of some Cepheid variables actually changes. 2. When getting dimmer, variable stars are releasing energy; when getting brighter they are storing energy. 3. variable stars are expanding and contracting 4. despite their variability, variable stars stay in a specific position on the H-R diagram. 5. A changing period in a Cepheid variable means that the size of the star is changing and that the star is therefore evolving. 6. Only stars on the instability strip are variable. 7. More massive stars will vary their brightness more quickly.arrow_forwardBased on what you learned about the source of stellar energy and how stars make energy, select all of the correct statements from the following list. 1. Many stars make energy with the proton-proton cycle. 2. The CNO cycle is more efficient than the proton-proton cycle. 3. The sun's energy comes from the CNO cycle.More massive stars make energy with the proton-proton cycle. 4. The leftover mass in both the proton-proton cycle and the CNO cycle is converted to energy. 5. A helium atom is more massive than four hydrogen atoms. 6. The CNO cycle requires a higher temperature than the proton-proton cycle.arrow_forwardKindly provide the solution to the following question using the GRASS method. Gravitational Fields - Orbital Speed question, (Unit: Gravitational, Electric, and Magnetic Fields). The images attached are the formulas for this unit and the question. Please make sure to show all your work using the GRASS (given, required, analysis, solution, and statement) method and using formulas from this unit (Gravitational, Electric, and Magnetic Fields).arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
General Relativity: The Curvature of Spacetime; Author: Professor Dave Explains;https://www.youtube.com/watch?v=R7V3koyL7Mc;License: Standard YouTube License, CC-BY