Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 15, Problem 1TQ
To determine
The reason why it is impractical to mine diamond from white dwarf.
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Why are red dwarfs very dim.
Calculate the size of a star if its surface temperature is 6000 K and has a power output of 5.6 x 1026 W.
Hertzsprung-Russell Diagram
Blue or blue-white
White
Yellow
Red-orange
Red
O Rigel
Superglants
Belelgne
Main Sequence
Alder
Glants
Suno
Alpho Coun
Sinus 8
White Dwarfs
50,000
20,000
6,000
5,000
3,000
10,000
Surface Temperature ()
Would the surface temperature of the stars classified as white dwarfs be generally higher or lower than that of the stars classified as giants?
O higher
O lower
29 30 31
32 33 34 35 36
37 38
Chapter 15 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 15 - Prob. 1QFRCh. 15 - Prob. 2QFRCh. 15 - Prob. 3QFRCh. 15 - Prob. 4QFRCh. 15 - Prob. 5QFRCh. 15 - Prob. 6QFRCh. 15 - Prob. 7QFRCh. 15 - Prob. 8QFRCh. 15 - Prob. 9QFRCh. 15 - Prob. 10QFR
Ch. 15 - Prob. 11QFRCh. 15 - Prob. 12QFRCh. 15 - Prob. 13QFRCh. 15 - What is nonthermal radiation?Ch. 15 - What happens when a gravitational wave moves? What...Ch. 15 - What is a black hole? Are they truly black? What...Ch. 15 - Prob. 17QFRCh. 15 - Prob. 18QFRCh. 15 - Prob. 19QFRCh. 15 - Prob. 20QFRCh. 15 - Prob. 1TQCh. 15 - Prob. 2TQCh. 15 - Prob. 3TQCh. 15 - Prob. 5TQCh. 15 - Prob. 6TQCh. 15 - Prob. 7TQCh. 15 - Prob. 8TQCh. 15 - Suppose you jumped into a black hole feet first....Ch. 15 - Prob. 10TQCh. 15 - Prob. 1PCh. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5PCh. 15 - Prob. 6PCh. 15 - Prob. 7PCh. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 10PCh. 15 - Prob. 11PCh. 15 - Prob. 12PCh. 15 - Prob. 1TYCh. 15 - Prob. 2TYCh. 15 - Prob. 3TYCh. 15 - Prob. 4TYCh. 15 - Prob. 5TYCh. 15 - Prob. 6TYCh. 15 - What evidence leads astronomers to believe that...Ch. 15 - (15.3) The Schwarzschild radius of a body is (a)...Ch. 15 - Prob. 9TYCh. 15 - Prob. 10TY
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- Suppose you want to search for brown dwarfs using a space telescope. Will you design your telescope to detect light in the ultraviolet or the infrared part of the spectrum? Why?arrow_forwardWould you expect to find any white dwarfs in the Orion Nebula? (See The Birth of Stars and the Discovery of Planets outside the Solar System to remind yourself of its characteristics.) Why or why not?arrow_forwardHertzsprung-Russell Diagram Blue or blue-white White Yellow Red orange Red O Rigel Superglants Betelger Main Sequence ANdetaran Glants Caur Sirus 5 White Dwarfs 50,000 20,000 10,000 6,000 5,000 3,000 Surface Temperature (C) Would the surface temperature of the stars classified as white dwarfs be generally higher or lower than that of the stars classified as giants? O higher O lower 29 30 31 32 33 34 35 36 37 ere to search -6useanuarrow_forward
- A star such as our Sun will eventually evolve to a “red giant” star and then to a “white dwarf” star. A typical white dwarf is approximately the size of Earth, and its surface temperature is about 2.4 × 104 K. A typical red giant has a surface temperature of 3.2 × 103 K and a radius ~90000 times larger than that of a white dwarf. Take the radius of the red giant to be 6 × 1010 m. What is the average radiated power per unit area of the red giant?_________W/m2 What is the average radiated power per unit area of the white-dwarf?________W/m2 What is the total power radiated by the red giant? _________W What is the total power radiated by the white dwarf? ________W Please show full work! Thank you!arrow_forward= 2000 K and a radius of R, A young recently formed planet has a surface temperature T Jupiter radii (where Jupiter's radius is 7 x 107 m). Calculate the luminosity of the planet and 2 determine the ratio of the planet's luminosity to that of the Sun.arrow_forwardWhy do you think astronomers have suggested three different spectral types (L, T, and Y) for the brown dwarfs instead of M? Why was one not enough?arrow_forward
- Why don't red dwarfs become giant stars?arrow_forwardThe mass of a star is 1.99·1031 kg and its angular velocity is 1.60E-7 rad/s. Find its new angular velocity if the diameter suddenly shrinks to 0.27 times its present size. Assume a uniform mass distribution before and after. Icm for a solid sphere of uniform density is 2/5 mr2.arrow_forwardThe Sun’s mass is 2.0×1030kg,2.0×1030kg, its radius is 7.0×105km,7.0×105km, and it has a rotational period of approximately 28 days. If the Sun should collapse into a white dwarf of radius 3.5×103km,3.5×103km, what would its period be if no mass were ejected and a sphere of uniform density can model the Sun both before and after?arrow_forward
- 1. a) What are brown dwarfs? b) What are T Tauri stars?arrow_forwardUse the H-R Diagram below to help answer the following questions. Luminosity (solar units) 10,000+ 1,000+ 100+ 10- .01+ .001+ .0001 B White Dwarfs 20,000 B Spectral Type A Main Sequence D 10,000 Temperature (K) FGK Red Giants 5,000 M -5 10 15 Absolute Magnitudearrow_forwardOne way that astronomers detect planets outside of our solar system (called exoplanets) is commonly referred to as the radial velocity method. This relies on the __________ ___________ to cause shifts in the spectral lines of stars as the stars perform tiny orbits around the center of mass of the host star and its orbiting planets. Those tiny orbits cause the stars to periodically (and therefore predictably) move closer to and further away from our solar system. Luckily, this method only relies on the motion of the star; its physical distance from us does not impact the resulting shifts.arrow_forward
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