The attractive force between protons and neutrons in the nucleus is brought about by the exchange of a virtual pi-meson (m_p = 140 MeV/c²).Estimate the longest time a p can exist in accordance with the uncertainty principle DE*Dt = h/2p.(h/2p = 1.05 x 10^-34 J*s,1 eV = 1.6 x 10^-19 C) A)3.3 x 10^-18s B)2.4 x 10^-21 s C)4.7 x 10^-24 s D)6.9 x 10^-27 s

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Quizplus · Accepted Answer

The uncertainty principle gives Δt = h/(2πΔE). Converting 140 MeV to joules and using the given h/2π value, the calculation yields approximately 4.7 x 10^-24 s.

The Attractive Force Between Protons and Neutrons in the Nucleus