
Concept explainers
Describe some differences between quasars and normal galaxies.

The difference between quasars and normal galaxies.
Answer to Problem 1E
Quasar is an active galaxy or young galaxy while normal galaxy is the regular galaxy, which was once a quasar but materials falling into it runs out.
Explanation of Solution
Quasars are young galaxies having large amount of gas and dust around their centers. The constituents around centers form a disc called as accretion disc spiraling into the black holes.
Friction and gravitational effects heat the disc as more and more constituents falling into it and it emits the electromagnetic radiation having vast amount of energy.Existence of quasar lasts until the constituents are falling into it. Once constituents run out, it remains no more quasars and converts into a normal galaxy.
Difference between quasars and normal galaxies:
- Quasars move with more speed than normal galaxies.
- Quasars are small in comparison to normal galaxies.
- Quasar’s emission lines shifts far to the red wavelength ranging from 15% to more than 96% the speed of light while a normal galaxy have both red and blue shifts.
- Quasars are 10 to 100 times more luminous than brighter normal galaxies.
- Quasar’s infrared and X-ray bands are brighter than normal galaxy.
Conclusion:
Thus, quasar is an active galaxy or young galaxy while normal galaxy is the regular galaxy, which was once a quasar but materials falling into it runs out.
Want to see more full solutions like this?
Chapter 27 Solutions
Astronomy
Additional Science Textbook Solutions
Microbiology with Diseases by Body System (5th Edition)
Human Physiology: An Integrated Approach (8th Edition)
Campbell Biology: Concepts & Connections (9th Edition)
Human Biology: Concepts and Current Issues (8th Edition)
Campbell Biology (11th Edition)
Microbiology: An Introduction
- Three moles of an ideal gas undergo a reversible isothermal compression at 20.0° C. During this compression, 1900 J of work is done on the gas. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Entropy change in a free expansion. Part A What is the change of entropy of the gas? ΤΕ ΑΣΦ AS = Submit Request Answer J/Karrow_forward5.97 Block A, with weight 3w, slides down an inclined plane S of slope angle 36.9° at a constant speed while plank B, with weight w, rests on top of A. The plank is attached by a cord to the wall (Fig. P5.97). (a) Draw a diagram of all the forces acting on block A. (b) If the coefficient of kinetic friction is the same between A and B and between S and A, determine its value. Figure P5.97 B A S 36.9°arrow_forwardPlease take your time and solve each part correctly please. Thank you!!arrow_forward
- help me answer this with explanations! thanks so mucharrow_forwardNo chatgpt pls will upvote Alreadyarrow_forwardWhat fuel economy should be expected from a gasoline powered car that encounters a total of 443N of resistive forces while driving down the road? (Those forces are from air drag, rolling resistance and bearing losses.) Assume a 30% thermodynamic efficiency.arrow_forward
- No chatgpt pls will upvotearrow_forward12. What is the angle between two unit vectors if their dot product is 0.5?arrow_forwardIf the car in the previous problem increases its power output by 10% (by pressing the gas pedal farther down), at what rate will the car accelerate? Hint: Consider the net force. In the previous problem the power was 31.8kWarrow_forward
- What power is required (at the wheels) for a 1400 kg automobile to climb a 4% grade at a constant speed 30 m/s while it is opposed by drag and rolling resistance forces totaling 500 N?arrow_forwardNo chatgpt pls will upvotearrow_forwardAs a box is lifted against gravity and placed on a shelf, how does the work done by the lifter compare with the work done by gravity? What is the net work done on the box? What does this imply about its change in kinetic energy? Use definitions and mathematics from this chapter to answer these questions.arrow_forward
- AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStaxStars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage LearningStars and GalaxiesPhysicsISBN:9781305120785Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning
- Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningHorizons: Exploring the Universe (MindTap Course ...PhysicsISBN:9781305960961Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning





