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doit_the_clown doit_the_clown
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In modern particle physics, the proton and the neutron are now thought to be composed of more fundamental particles called
   A)  photons.    B)  gluons.    C)  neutrinos.    D)  quarks.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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doit_the_clown Author
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7 years ago
Thank you, thank you, thank you!
GeorgeNeist
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Yesterday
this is exactly what I needed
smi3
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2 hours ago
Just got PERFECT on my quiz
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