21ST CENT AST EBK W/SW5&WKBK >BI<
6th Edition
ISBN: 9780393433050
Author: Kay
Publisher: NORTON
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Chapter 16, Problem 8QP
To determine
The reason for which the post-main sequence stars lose up to half their mass.
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There is a mass–luminosity relation because
a.
hydrogen fusion produces helium.
b.
stars expand when they become giants.
c.
stars support their weight by making energy.
d.
the helium flash occurs in degenerate matter.
e.
all stars on the main sequence have about the same radius.
The theory that the collapse of a massive star’s iron core produces neutrinos was supported by
a.
the size and structure of the Crab nebula.
b.
laboratory measurements of the mass of the neutrino.
c.
the brightening of supernovae a few days after they are first visible.
d.
underground counts from solar neutrinos.
e.
the detection of neutrinos from the supernova of 1987.
As a white dwarf cools, its radius will not change because
a.
pressure resulting from nuclear reactions in a shell just below the surface keeps it from collapsing.
b.
pressure does not depend on temperature for a white dwarf because the electrons are degenerate.
c.
pressure does not depend on temperature because the white dwarf is too hot.
d.
pressure does not depend on temperature because the star has exhausted all its nuclear fuels.
e.
material accreting onto it from a companion maintains a constant radius.
Chapter 16 Solutions
21ST CENT AST EBK W/SW5&WKBK >BI<
Ch. 16.1 - Prob. 16.1CYUCh. 16.3 - Prob. 16.3CYUCh. 16.4 - Prob. 16.4CYUCh. 16.5 - Prob. 16.5CYUCh. 16 - Prob. 1QPCh. 16 - Prob. 2QPCh. 16 - Prob. 3QPCh. 16 - Prob. 4QPCh. 16 - Prob. 5QPCh. 16 - Prob. 6QP
Ch. 16 - Prob. 8QPCh. 16 - Prob. 9QPCh. 16 - Prob. 10QPCh. 16 - Prob. 11QPCh. 16 - Prob. 12QPCh. 16 - Prob. 13QPCh. 16 - Prob. 14QPCh. 16 - Prob. 15QPCh. 16 - Prob. 16QPCh. 16 - Prob. 17QPCh. 16 - Prob. 18QPCh. 16 - Prob. 19QPCh. 16 - Prob. 20QPCh. 16 - Prob. 21QPCh. 16 - Prob. 23QPCh. 16 - Prob. 24QPCh. 16 - Prob. 25QPCh. 16 - Prob. 26QPCh. 16 - Prob. 27QPCh. 16 - Prob. 28QPCh. 16 - Prob. 29QPCh. 16 - Prob. 30QPCh. 16 - Prob. 31QPCh. 16 - Prob. 32QPCh. 16 - Prob. 33QPCh. 16 - Prob. 34QPCh. 16 - Prob. 35QPCh. 16 - Prob. 36QPCh. 16 - Prob. 37QPCh. 16 - Prob. 38QPCh. 16 - Prob. 39QPCh. 16 - Prob. 40QPCh. 16 - Prob. 41QPCh. 16 - Prob. 42QPCh. 16 - Prob. 43QPCh. 16 - Prob. 44QPCh. 16 - Prob. 45QP
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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
- The triple-alpha process a. controls the pulsations in Cepheid variable stars. b. is the nuclear fusion of hydrogen to helium in massive stars. c. is the process that produces the neutrinos we receive from the sun. d. requires a temperature of about 5,000,000 K to operate. e. fuses helium nuclei to make carbon and occurs during helium flash.arrow_forwardStars are born in a. reflection nebulae. b. dense molecular clouds. c. HII regions. d. the intercloud medium. e. the local bubble.arrow_forwardStars that contract the quickest to land on the zero-age main sequence on the H–R diagram a. are the most massive. b. are the least massive. c. are neither the most massive nor the least massive. d. all stars contract at the same rate. e. stars similar in mass to the sun.arrow_forward
- A shell of gas slowly ejected by a giant star is known as a a. supernova remnant. b. nova remnant. c. planetary nebula. d. reflection nebula.arrow_forwardWhich of the following is wrong? A. Tidal effects in a binary star system become more important when one or both stars become giant stars. B. There is no fusion occurring in the core of a low-mass red giant star. C. Gold (the element) is produced during the supernova explosions of high-mass stars. D. Suppose the star Betelgeuse were to become a supernova tomorrow, we'd see by naked eyes a cloud of gas expanding away from the position where Betelgeuse used to be. Over a period of a few weeks, this cloud would fill a large part of our sky.arrow_forwardWhere does gold (the element) come from? A. It is produced during the supernova explosions of high-mass stars. B. It was produced during the Big Bang. C. It is produced by mass transfer in close binaries. D. It is produced during the late stages of fusion in low-mass stars.arrow_forward
- Which of the following binary star systems cannot exist? A. A 1 solar-mass main sequence star and a 4 solar mass red giant with a size 100 times smaller than the orbital distance. B. A 15 solar-mass main sequence star and a 10 solar mass red giant with a size 100 times smaller than the orbital distance. C. A 1 solar-mass main sequence star and a 4 solar-mass main sequence star. D. A 2 solar-mass main sequence star and a 1 solar mass red giant with a size a few times smaller than the orbital distance.arrow_forwardA helium flash occurs a. because helium is very explosive and cannot be controlled when the nuclear reactions occur. b. because degenerate electrons in the core do not allow the core to expand as it heats up. c. in Cepheid variables. d. in stars with masses less than 0.4 M. e. under none of the above conditions.arrow_forward2. What must be the radius of a star of mass 2.0x10" kg so that the escape speed from this star is equal to 2x 10" m/s?arrow_forward
- Which of the following statements is wrong? A. A main-sequence star is cooler and brighter than it was as a protostar. B. Carbon fusion occurs in high-mass stars but not in low-mass stars because the cores of low-mass stars never contain significant amounts of carbon. C. when a main-sequence star exhausts its core hydrogen fuel supply, the core shrinks while the rest of the star expands. D. After a supernova explosion, the remains of the stellar core will be either a neutron star or a black hole.arrow_forward2. A solar-type star is seen with an apparent magnitude my = 30. Assuming that there is no extinction along the line-of-sight, how far away is the star? What is its distance if a visual extinction of Av = 0.3 magnitudes is present?arrow_forwardAbsorption lines produced by interstellar gas a. are wider than the lines from stars because the gas is hotter than most stars. b. are more narrow than the lines from stars because the gas has a lower pressure than stars. c. indicate that the interstellar medium contains dust. d. indicate that the interstellar medium is expanding away from the sun. e. indicate nothing; none of the above statements are true.arrow_forward
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