First you need to know about two laws, which are:
1) Coulomb's law
2) Newton's law of gravitation
1.
According to Coulomb's law, Electric force between TWO charges is:

-- (A)
Where, k = 1/(4*π*epsilon_not) =

Both

and

= -1.61 x

C
r = Distance between the two charges = 2.00m
Plug-in the above values in (A), you would get:

= (9 *

) (1.61 *

* 1.61 *

) / (2*2)

=

N
2.According to Newton's law of gravitation:

-- (B)
Where G = Gravitational constant = 6.674 *

m1 = m2 = Mass of the electron =

kg
r = 2.0 m
Plug-in the above values in (B), you would get:

= (6.674 *

) (

*

}[/tex]) / (2*2)

=

N

=

Now do Fe over Fg, you would get:
Ans: So the blanks are:1) 5.822) 1.383) 4.23
-i