Neutrons are good "projectiles" for inducing nuclear reactions because they
a. have no electric charge.
b. are themselves unstable.
c. are highly energetic.
d. have no mass.
a
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A) the surface of a white dwarf B) the surface of the Sun C) the surface of the Earth D) the top of Mount Everest on Earth E) in empty space
If nuclear reactions in the core produce harmful gamma rays, why are Earthlings not destroyed?
A: Our super skin protects us. B: We are continually destroyed and then regenerated without knowing it. C: The reactions really produce yellow light, not gamma rays. D: The gamma rays are converted to visible light by the time they reach the photosphere. E: None of the above.
Enzymes are an example of__________
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On a Hertzsprung-Russell diagram, where would we find stars that have the largest radii?
A) upper right B) lower right C) upper left D) lower left