Multiple Choice
The velocities of distant objects in the universe indicate that the time elapsed since the big bang is about:
A) 105 y
B) 1010 y
C) 1015 y
D) 1020 y
E) 1025 y
Correct Answer:

Verified
Correct Answer:
Verified
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Q13: Messenger particles of the electromagnetic interaction are
Q14: A particle with spin angular momentum <img
Q15: A particle can decay to particles with
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