if the mass of a proton is 1.67×10^-27kg an the mass of an electron is 9.11×10^-31kg
calculate the mass of gravitational between
(1)a proton and an electron
(2)two electron
(3)two proton
take g=6.67×10^-11nm^2kg^-2 distance between the proton =4.0m distance between the electron s=2×10^-2m distance between the proton and electron =5.4×10^-11m
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