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The Mass of a Proton Is 1

Question 55

Multiple Choice

The mass of a proton is 1.67 × 10-27 kg. For what maximum length of time could a proton-antiproton pair spontaneously come into existence, without violating any laws of physics such as conservation of energy?


A) 3.5 × 10-25 s
B) 1.1 × 10-16 s
C) 2.2 × 10-16 s
D) 7.0 × 10-27 s

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