The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133889567
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 8, Problem 9QQ
Choose the best answer to etch of the following. Explain your reasoning.
Which of these stars has the coolest surface temperature? (a) an A star (b) an F star(c) an K star
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
State the definition for a parsec, and derive its value in terms of As- tronomical Units. Convert your answer for the value of the distance of a parsec in Astronomical Units into light years. Be sure to include a large and clearly labeled diagram showing how you arrived at your conclusions. Be sure to show all work!
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
a) The star 58 Eridani is a feint but naked-eye star similar to the Sun. Suppose that you are observing this star in the night sky without a telescope. Ignoring any interstellar extinction or atmospheric absorption, approximately how many photons per second arrive at your retina? Show all steps in your calculation. Look up any required information about the star using Wikipedia. Use sensible approximations so your calculation is straightforward. For example you could consider only the region of the spectrum where the photon flux peaks.
b) The Mid-Infrared Instrument (MIRI, camera and spectrograph) on the James Webb Space Telescope operates in the band 5 – 28 µm. For 58 Eridani, approximately how many photons per second can be used by this instrument? Assume that MIRI takes all the photons from the full JWST mirror. Show all steps in your calculation. Describe briefly two or three other factors which play a role in determining the sensitivity of an instrument such as MIRI?
Chapter 8 Solutions
The Cosmic Perspective Fundamentals (2nd Edition)
Ch. 8 - Prob. 1QQCh. 8 - Choose the best answer to etch of the following....Ch. 8 - Choose the best answer to each of the following....Ch. 8 - Prob. 4QQCh. 8 - Choose the best answer to etch of the following....Ch. 8 - Prob. 6QQCh. 8 - Choose the best answer to etch of the following....Ch. 8 - Choose the best answer to etch of the following....Ch. 8 - Choose the best answer to etch of the following....Ch. 8 - Choose the best answer to etch of the following....
Ch. 8 - Choose the best answer to etch of the following....Ch. 8 - Choose the best answer to etch of the following....Ch. 8 - Prob. 13SEQCh. 8 - Prob. 14SEQCh. 8 - Prob. 15SEQCh. 8 - Explain all answers clearly, with complete...Ch. 8 - Prob. 17SEQCh. 8 - Prob. 18SEQCh. 8 - Prob. 19SEQCh. 8 - Prob. 20SEQCh. 8 - Explain all answers clearly, with complete...Ch. 8 - Prob. 22SEQ
Additional Science Textbook Solutions
Find more solutions based on key concepts
Connections to the body for electrocardiography (ECG) and electroencephalography (EEG) are normally made with m...
Essential University Physics: Volume 2 (3rd Edition)
40. A 5.0-rn-diameter merry-go-round is initially turning with a
4.0 s period. It slows down and stops in 20 s...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
(II) Show, using a ray diagram, that the magnification m of a convex mirror is m = −di/do, just as for a concav...
Physics for Scientists and Engineers with Modern Physics
For a solid, we also define the linear thermal expansion coefficient, a, as the fractional increase in length p...
An Introduction to Thermal Physics
Express the unit vectors in terms of (that is, derive Eq. 1.64). Check your answers several ways Also work o...
Introduction to Electrodynamics
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
- 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.arrow_forwardThe time it takes for a cloud 106,000 AU in radius to collapse in "free-tall to form a new star is half the time it would take for an object to orbit the star on an extremely elliptical orbit with a semimajor axis of 53,000 AU (half the 106.000 AU radius). Part A Use Kepler's third law to find the collapse time, assuming the star has the same mass as the Sun. Express your answer in years to two significant figures. VE ΑΣΦΑ t= Submit Provide Feedback Request Answer yearsarrow_forwardAnalyze the multi-wavelength images below and answer the few questions that follows up : 1. Where do you see the higher energy phenomena? What are they? Are they visible in any image? Why?2. Where are the young stars? What colour do they have? Are they visible in any image? Why?3. Where are the old stars? What colour do they have? Are they visible in any image? Why?arrow_forward
- Please Explain The hotness of stars goes up to millions of degrees Celsius. The coldness of gases can go as low as -273.15 o C. How do you explain the absence of symmetry between hot and cold? Is it possible that there is also a limit to the hotness of any object in the universe? Show your step-by-step solutions.arrow_forwardRead all the instructions carefully then answer. Kindly give me a detailed answer in a clear handwriting of the subparts ,e,f and g by mentioning the subpart's name. It is one whole question. All the subparts are related. Take your time solving this. I am attaching the full question but I only need e,f and g (in details). All the questions are related. This is my fourth time uploading these questions as I got wrong answers previously. So kindly answer this one by following the given instructions. I am strictly forbading to give the answers of subpart a and b. This is my fourth time uploading this question and everytime you are giving me answers of a,b and c. I will upvote if the answer is correct. Thank you.arrow_forwardMatch each characteristic below to the appropriate stellar end state. (Select W-White dwarf, N-Neutron star, B-Black hole. If the first is W and the rest N, enter WNNNNNNN). A) Has a mass no greater than 1.4 solar-masses. B) Sometimes appears as a pulsar. C) Size defined by its Schwarzschild radius. D) In a binary system it can explode as a supernova. E) Supported by electron degeneracy pressure. F) Typically about the size of Earth. G) Usually has a very strong magnetic field. H) Viewed from afar, time stops at its event horizon. Answer: Submit All Answersarrow_forward
- Choose 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_forwardfor question three can you solve the question directly using the formula N=N0e-t/? given that t1/2=?ln2=0.693? because I cant find it in the textbook of how you plugged in lambdaarrow_forwardChoose the correct statements concerning spectral classes of stars. (Give ALL correct answers, i.e., B, AC, BCD...) A) K-stars are dominated by lines from ionized helium because they are so hot. B) Oh Be A Fine Guy/Girl Kiss Me, is a mnemonic for remembering spectral classes. C) The spectral sequence has recently been expanded to include L, T, and Y classes. D) Hydrogen lines are weak in type O-stars because most of it is completely ionized. E) Neutral hydrogen lines dominate the spectrum for stars with temperatures around 10,000 K because a lot of the hydrogen is in the n=2 level. F) The spectral types of stars arise primarily as a result of differences in chemical composition.arrow_forward
- Write 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_forwardPart 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_forwardUsing a Hertzsprung–Russell diagram to illustrate your answer, describe in detail the followingmain stages of a solar mass star’s evolutionary track. You should briefly describe the importantphysical process/processes at each stage, and one or two observational facts.• protostar• main-sequence• post-main-sequencearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
General Relativity: The Curvature of Spacetime; Author: Professor Dave Explains;https://www.youtube.com/watch?v=R7V3koyL7Mc;License: Standard YouTube License, CC-BY