Which of these particles has the least mass?
A) electron neutrino
B) muon
C) electron
D) pion
Correct Answer:
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Q43: If a photon produces an electron-positron pair
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Q46: "MeV/c2" is a unit for
A)energy.
B)mass.
C)momentum.
D)nuclear force.
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Q50: The virtual exchange of photons can produce
A)a
Q51: According to present theories,there is a neutrino
Q52: Which of the following is not a
Q53: Which of these particles has the most
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