Test Bank Docx Farther and Faster Palen Third Edition - Understanding Our Universe 3e Complete Test Bank by Stacy Palen. DOCX document preview.
Mission 14: Farther and Faster
MULTIPLE CHOICE
1. Given that the main-sequence lifetime of the Sun is calculated to be 10 billion years, choose which of the following best approximates the main-sequence lifetime of a star that is 100 times the more massive than the Sun.
a. 1 trillion years d. 1 million years
b. 100 billion years e. 100,000 years
c. 1 billion years
2. How many times more luminous than the Sun is the 100 mass star in Eta Carinae?
a. 107 times d. 104 times
b. 106 times e. 103 times
c. 105 times
3. What is the angular size of the Homunculus Nebula, given a diameter of ~0.1 pc and a distance of 2,300 pc?
a. 0.9 arcseconds d. 20 arcseconds
b. 2.0 arcseconds e. 90 arcseconds
c. 9 arcseconds
4. Strontium-88 is stable and the most abundant isotope occurring in nature. How many protons and neutrons does it have in its nucleus?
a. 35 protons and 52 neutrons d. 38 protons and 50 neutrons
b. 36 protons and 52 neutrons e. 39 protons and 49 neutrons
c. 37 protons and 51 neutrons
5. Which of the following are typical phenomena associated with dying stars, both high-mass and low-mass?
a. strong stellar winds/mass loss d. contraction and heating of the cores
b. formation of bipolar ejecta e. all of the above
c. expansion of stellar surfaces
1. Why is little known about the lives and deaths of massive stars when compared to that of low-mass stars?