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Find the force of electrical attraction between a proton and an electron that are 8.4 10-11...

Find the force of electrical attraction between a proton and an electron that are 8.4 10-11 m apart. (Enter the magnitude only.)

N

Compare this to the gravitational force between these particles.

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Answer #1

solution-

a)the electric force between

where =charge magnitude on electron or proton=1.60*10^-19C

   r=seperation distance =8.4*10^-11m

K=constant=8.99*10^9Nm^2/C^2

therefore

   =3.26*10^-8N..................answer

b) Gravitational force

where G=gravity constant =6.67*10-11Nm^2/kg^2

   Me=mass of electron=9.11*10^-31kg

Mp= mass of proton=1.67*10^-27kg

therefore Fg

   =1.44*10^-47N

the ratio of electric to the gravitational force between the electron and proton=Fe/Fg

   =3.26*10^-8N/1.44*10^-47N

   =2.26*10^39

(the electric force is 2.26*10^39 times larger than the gravitational force)

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