SBCC - ERTH 101 - Sean Kelly - Final Study Guide
(Most Missed Questions) Questions and Correct
Answers | Latest Update
1. Why does fusion take place at very high temperatures?
Ans: High temperatures mean high collisional velocities, which can
allow protons to overcome their mutual electrical repulsion.
How did Harlow Shapley avoid the bias of dust when measuring the size
and shape of the Milky Way?
Assignment Expert
Ans: By using globular clusters
The ion tail of a comet points:
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Ans: in the direction of solar wind.
Spring Tides occur:
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Ans: during new and full moon.
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5. As a result of collision, galaxies are most likely to evolve:
Ans: from spirals to ellipticals
A comet moves on an elliptical orbit around the sun. Where is the comet's
speed largest?
Ans: Perihelion.
What happens when a White Dwarf steals enough mass from it's
companion to exceed 1.4 solar masses.
Ans: it fuses nearly all of its carbon at once and becomes a supernova.
Which of the following electron transitions would release a photon with
the most energy?
, 2 for specific request mail
Ans: 4 to 1
Where is the Sun located within the Milky Way?
Ans: in the disk, about 8 kpc from the center.
10. Where is the Sun located within the Milky Way?
Ans: In the disk, about 8 kpc from the center.
Why does stellar fusion of massive stars end with an iron core?
Ans: Iron does not release energy when it undergoes fusion.
Assignment Expert
What stops the collapse of the most massive stars (cores greater than 3
solar masses) at the end of their lives.
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Ans: Electron degeneracy pressure.
Massive stars on the main sequence generate energy primarily through
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the:
Ans: Proton-proton cycle.
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15. Which star has the largest radius?
Ans: Red Supergiant (Top-left).
According to the general theory of relativity, gravity:
Ans: Is a warping.
Affects all forms of energy.
Is equivalent to an accelerating reference of frame.
Which of the following is closest to the size of the white dwarf?
Ans: A small city.