3. Two electrons are placed at a distance of 1 fermi
(femtometre). Calculate the gravitational force of
attraction between them. Given : mass of electron
9.1 x 10-31 kg and 1 fermi = 10-15
m.
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Answer:
Mass of the electrons = 9.1*10^-31 kg
Distance between them = 10^-15 m
Gravitational Constant = 6.67*10^11 N.m^2/kg^2
Force = (Gm1m2)/r^2
= (6.67*9.1*9.1*10^-11+31+31) / (10^-15)^2
= (552.3427*10^51) / (10^-30)
= 552.3427*10^51-(-30)
= 552.3427*10^81 N
I hope this helps.
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