a) Find the magnitude of the

Question

electrostatic force between 2
negative charges separated by a
distance of 1augustro.
b)what is the magnitude of gravit'l
force between the negetive charges
(electro)?
c) determine the ratio of the gravt'l
force and electrostatic force.
(Help with even the formulae!)

Answer 1

I am not familiar with a length unit called an "augustro".

Do you possibly mean one Angstrom? That is 10^-8 cm

If you want the ratio of gravitational and electrical forces you have to say what the particles are. One cannot be a proton, since you have said they are both negative.