What is the direction of the force? Answer with a positive angle measured counterclockwise from the positive x axis.

hello the diagram related to your question is missing attached below is the missing diagram

answer : 107.07⁰

Explanation:

The direction of the force can be calculated as below

angle = 180 - ∝ - ∅  ------ 1

∅ = = tan^-1 ( 0.429 )

∅ = 23.2⁰

∝  can be determined by applying the parallelogram law

∝ =

   = tan^-1 ( 21.173 / 17.935 )

∝ = 49.73⁰    

back to equation 1 direction of force with positive angle

= 180 - 49.73 - 23.2 = 107.07⁰

so easy. just google the electromagnetic waves and it’ll pop up.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.