The attractive force between protons and neutrons in the nucleus is brought abou

Question

                        The attractive force between protons and neutrons in the nucleus is brought about by the exchange of a virtual pi-meson(m_pi=140 MeV/c^2
                    

                        estimate the longest time a virtual pi^0 can exist, in accordance with the uncertainty principle (delta)E(delta)t=h. 1eV=1.6*10^-19J                     

                        1) 6.58283*10^-16 s                     

                        2) none of these
                    

                        3) 4.70202*10^-24 s
                    

                        4) 4.70202*10^-18 s                     

                        5) 4.70202*10^-26 s                     

                        6) 7.53264*10^-37 s
                    

                        7) 4.70202*10^-12 s                     

Explanation / Answer

delta E=mass*c^2=140 MeV=2.24*10^(-11) J

now delta E*delta t = h/(2*pi)

so delta t=4.70202*10^(-24) sec

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.