A. B. Answer ALL questions on your Opscan, using a #2 pencil. Make sure to include your NAME and STUDENT ID. The computer identifies you by your student ID; do not forget to include it. C. D. E. Do NOT mark your date of birth. The exam is CLOSED BOOK. You should not use any books or notes. Time: 2 HOURS and 30 MINUTES.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What is the ultimate fate of an isolated pulsar? A) As gravity overwhelms the neutron degeneracy pressure, it will explode as a supernova. B) It will spin ever faster, becoming a millisecond pulsar. C) The neutron degeneracy pressure will eventually overwhelm gravity and the pulsar will slowly evaporate. D) As gravity overwhelms the neutron degeneracy pressure, it will become a white dwarf. E) It will slow down, the magnetic field will weaken, and it will become invisible. 2) Which of the following statements about globular clusters is false? A) Globular cluster stars are very metal-poor relative to the Sun. B) Globular cluster stars are more than 12 billion years old. C) Globular clusters are distributed spherically around the Milky Way. D) Globular clusters contain many thousands of stars. E) Globular cluster ages increase with distance from the Milky Way. 3) Which of the following characteristics of stars has the greatest range in values? A) mass B) core temperature C) radius D) surface temperature E) luminosity 4) Which statement best describes the solar neutrino problem? A) Solar neutrinos have been detected, but in fewer numbers than predicted by theoretical models. B) No one understands how it can be possible for neutrinos to be produced in the Sun. C) Our current understanding of fusion in the Sun suggests that all neutrinos should be destroyed before they arrive at the earth, yet neutrinos are being detected. D) Theoretical models predict that neutrinos... [continues]
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