What will be the predominant element within the Sun after it has died?
A) helium
B) nitrogen
C) carbon
D) phosphorous
Answer: C
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An object moving with speed 
collides head-on with an object at rest that is very much more massive. If the collision is elastic, how does the lighter object’s speed 
after collision compare to ?
A. 
B. 
C. 
D. 
E. 
F. 
Stars only form in molecular clouds that contain more than 100 times the mass of our Sun
Indicate whether the statement is true or false
A successful theory of the formation of the solar system must explain:
A) that all planets rotate in a prograde sense. B) that all planets have elliptical orbits with high eccentricities. C) the existence of the asteroid belt between Jupiter and Neptune. D) that the inner planets have more hydrogen and helium in their atmospheres than do the outer planets. E) all observed properties of the solar system.
Galileo invented the telescope
a. True b. False Indicate whether the statement is true or false