Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 13, Problem 5QAP
To determine
The given statement is true or false.
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Astronomers think of pulsars not as pulsing objects, but rather like a(n)
a.
Cepheid variable.
b.
eclipsing binary system.
c.
RR Lyrae variable.
d.
lighthouse with a beam that sweeps around the sky.
e.
car with beams coming out as it drives on a straight road.
Pulsars result from
a. expanding red giant stars
b. white dwarf supernovas
c. spinning neutron stars
The maximum mass limit for a ________________ is 1.4 solar masses.
a.
red dwarf
b.
white dwarf
c.
neutron star
d.
black hole
Chapter 13 Solutions
Understanding Our Universe
Ch. 13.1 - Prob. 13.1CYUCh. 13.2 - Prob. 13.2CYUCh. 13.3 - Prob. 13.3CYUCh. 13.4 - Prob. 13.4CYUCh. 13.5 - Prob. 13.5CYUCh. 13.6 - Prob. 13.6CYUCh. 13 - Prob. 1QAPCh. 13 - Prob. 2QAPCh. 13 - Prob. 3QAPCh. 13 - Prob. 4QAP
Ch. 13 - Prob. 5QAPCh. 13 - Prob. 6QAPCh. 13 - Prob. 7QAPCh. 13 - Prob. 8QAPCh. 13 - Prob. 9QAPCh. 13 - Prob. 10QAPCh. 13 - Prob. 11QAPCh. 13 - Prob. 12QAPCh. 13 - Prob. 13QAPCh. 13 - Prob. 14QAPCh. 13 - Prob. 15QAPCh. 13 - Prob. 16QAPCh. 13 - Prob. 17QAPCh. 13 - Prob. 18QAPCh. 13 - Prob. 19QAPCh. 13 - Prob. 20QAPCh. 13 - Prob. 21QAPCh. 13 - Prob. 22QAPCh. 13 - Prob. 23QAPCh. 13 - Prob. 24QAPCh. 13 - Prob. 26QAPCh. 13 - Prob. 27QAPCh. 13 - Prob. 28QAPCh. 13 - Prob. 29QAPCh. 13 - Prob. 30QAPCh. 13 - Prob. 31QAPCh. 13 - Prob. 32QAPCh. 13 - Prob. 33QAPCh. 13 - Prob. 35QAPCh. 13 - Prob. 36QAPCh. 13 - Prob. 37QAPCh. 13 - Prob. 38QAPCh. 13 - Prob. 39QAPCh. 13 - Prob. 40QAPCh. 13 - Prob. 41QAPCh. 13 - Prob. 43QAPCh. 13 - Prob. 44QAPCh. 13 - Prob. 45QAP
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- Describe the evolution of a pulsar over time, in particular how the rotation and pulse signal changes over time.arrow_forwardCygnus X-1 and LMC X-3 are black holes if the masses of the unseen companions are a. between 1.4 and 3 solar masses. b. more than 3 solar masses. c. between 0.4 and 1.4 solar masses. d. less than 0.4 solar masses e. not larger than the masses of the stars that we can see.arrow_forwardOriginally, the signals that were found to be pulsars were thought to be a. spinning neutron stars. b. spinning white dwarfs. c. spinning black holes. d. little green men.arrow_forward
- Why don’t all supernova remnants contain pulsars? a. All supernova remnants do contain pulsars. b. Some supernova explosions form white dwarfs instead of the neutron stars necessary for pulsars. c. Pulsars slow down and quit producing the pulses before the supernova remnant dissipates. d. The pulsar may be tipped so that the beams do not sweep past Earth. e. b and carrow_forwardThe density of a ________________ is greater than the density of a _________________. a. white dwarf; neutron star b. neutron star; black hole c. pulsar; neutron star d. pulsar; white dwarf e. white dwarf; black holearrow_forwardA Type Ia Supernova is an example of a: a. Parallax object b. Moving cluster object c. Standard ruler object d. Standard candle objectarrow_forward
- What triggers the nucleus of a galaxy into activity? a. a nova explosion b. a type I supernova explosion c. a hypernova explosion d. a type II supernova explosion e. none of the abovearrow_forwardWhich of the following objects is considered to possibly contain a black hole? a. the central star of the Crab nebula b. the Orion nebula c. LMC X-3 d. Algol e. PSR 1257+12arrow_forwardSaturn is approximately 10 times as far away from the sun as the earth. If dark matter changed the orbital properties of the planets so that Saturn had the same orbital speed as the earth, Saturn’s orbital acceleration would be ________ that of the earth.A. 1/10B. 1/100C. 1/1000D. 1/10,000arrow_forward
- A binary pulsar orbits with radial velocity 0.00004 times the speed of light. If the difference between the rest period and the minimum period over the course of the orbit is 0.001 ms, what is the rest period of the pulsar? 25 ms Trick question: this value cannot be calculated without more information 250 ms O 2.5 msarrow_forwardAfter a supernova explosion, the remaining core will collapse to form a black hole if the mass of the core is a. less than one solar mass b. more than 3 solar masses c. between 1 and 1.5 solar masses d. between 1.5 and 3 solar massesarrow_forwardWhat makes us think that the star system Cygnus X-1 contains a black hole? A, It emits X rays characteristic of an accretion disk, but the unseen star in the system is too massive to be a neutron star. B. No light is emitted from this star system, so it must contain a black hole. C. The fact that we see strong X-ray emission tells us that the system must contain a black hole. D.Cygnus X-1 is a powerful X-ray burster, so it must contain a black hole.arrow_forward
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