21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
6th Edition
ISBN: 9780393874921
Author: PALEN
Publisher: Norton, W. W. & Company, Inc.
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Chapter 21, Problem 13QP
To determine
The Big Bang is.
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Black hole candidates are conspicuous by their continuous or flickering emission of
a.
infrared light.
b.
ultraviolet light.
c.
gamma rays.
d.
X rays.
e.
all of the above.
An explosive, although nondestructive, event on the surface of a white dwarf that is part of a binary system results in a
a.
planetary nebula.
b.
type I supernova.
c.
type II supernova.
d.
nova.
Hypernovae are thought to be
a.
a star greater than 20 solar masses collapsing into a black hole.
b.
binary systems involving mass transferred to a neutron star.
c.
binary systems involving mass transferred to a white dwarf.
d.
two main-sequence stars colliding.
e.
binary systems involving mass transferred to a black hole.
Chapter 21 Solutions
21ST CENT.ASTRONOMY(LL)W/CODE WKBK PKG.
Ch. 21.1 - Prob. 21.1CYUCh. 21.2 - Prob. 21.2CYUCh. 21.3 - Prob. 21.3ACYUCh. 21.3 - Prob. 21.3BCYUCh. 21.4 - Prob. 21.4CYUCh. 21 - Prob. 1QPCh. 21 - Prob. 2QPCh. 21 - Prob. 3QPCh. 21 - Prob. 4QPCh. 21 - Prob. 5QP
Ch. 21 - Prob. 6QPCh. 21 - Prob. 7QPCh. 21 - Prob. 8QPCh. 21 - Prob. 9QPCh. 21 - Prob. 10QPCh. 21 - Prob. 11QPCh. 21 - Prob. 12QPCh. 21 - Prob. 13QPCh. 21 - Prob. 14QPCh. 21 - Prob. 15QPCh. 21 - Prob. 16QPCh. 21 - Prob. 17QPCh. 21 - Prob. 18QPCh. 21 - Prob. 19QPCh. 21 - Prob. 20QPCh. 21 - Prob. 21QPCh. 21 - Prob. 23QPCh. 21 - Prob. 24QPCh. 21 - Prob. 25QPCh. 21 - Prob. 26QPCh. 21 - Prob. 27QPCh. 21 - Prob. 28QPCh. 21 - Prob. 29QPCh. 21 - Prob. 30QPCh. 21 - Prob. 31QPCh. 21 - Prob. 32QPCh. 21 - Prob. 33QPCh. 21 - Prob. 34QPCh. 21 - Prob. 35QPCh. 21 - Prob. 36QPCh. 21 - Prob. 37QPCh. 21 - Prob. 38QPCh. 21 - Prob. 39QPCh. 21 - Prob. 40QPCh. 21 - Prob. 41QPCh. 21 - Prob. 42QPCh. 21 - Prob. 43QPCh. 21 - Prob. 44QPCh. 21 - Prob. 45QP
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- A 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_forwardThe 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_forwardThe big bang happened a. in the Hyades cluster. b. in the Virgo cluster. c. in the Sagittarius spiral arm. d. in the Andromeda Galaxy. e. in all of these locations.arrow_forward
- Outbursts seen as quasars were triggered by a. a helium flash. b. a planetary nebula. c. the abundance of matter flooding into the black hole. d. a supernova. e. synchrotron radiation.arrow_forwardWhen a mass is transferred through the inner Lagrangian point in a binary system toward a white dwarf, the material forms a rapidly growing whirlpool of material known as a(n) a. accretion disk. b. Lagrangian point. c. Algol paradox. d. planetary nebula. e. supernova remnant.arrow_forwardIf the Hubble constant equals 70 km/s/Mpc, the age of the universe roughly equals a. 6 billion years. b. 10 billion years. c. 12 billion years. d. 14 billion years. e. 20 billion years.arrow_forward
- The first planets found in a pulsar system were found to have a mass of about a. 1 Earth mass. b. 3–4 Earth masses. c. 20 Earth masses. d. 100 Earth masses. e. zero, because planets have not been found around pulsars.arrow_forwardThe orbit of the binary pulsar PSR 1936+16, studied by Taylor and Hulse, a. is so small that the orbital period is smaller than the pulsar period. b. is growing smaller, presumably by emitting gravitational waves. c. provides evidence that it is being orbited by at least 6 planets the size of Jupiter. d. shows large changes each time an X ray burst is emitted from the system. e. contains a white dwarf and a black hole.arrow_forwardMeasured ages of globular clusters and a study of the time required for massive stars to build up the present abundance of heavy elements suggests that the universe is a. at least 20 billion years old. b. no more than 10 billion years old. c. about 14 billion years old. d. flat. e. closed.arrow_forward
- 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.arrow_forwardIf a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a a. brown dwarf. b. red dwarf. c. white dwarf. d. neutron star. e. black hole.arrow_forwardA group of 10 to 100 stars that formed at the same time but are so widely scattered in space their mutual gravity cannot hold them together is called a. a globular cluster. b. an open cluster. c. an association. d. a spherical component e. an accretion disk.arrow_forward
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