Applications to Astronomy: About 1 ?s after the Big Bang, the temperature of the universe was about 1013 K. What particle kinetic energy (in eV) does this correspond to? (1 eV = 1.60 × 10-19 J, k = 1.38 × 10-23 J/K)
A. 1 keV
B. 1 MeV
C. 1 GeV
D. 1 TeV
Answer: C
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Newton's third law states that forces occur in pairs acting in the same direction
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