Question

could anyone help me out with my Physics problem it has five parts.

Answer 1

You'll need a couple equations and a constant:
\[F =kQ _{1}Q _{2}/d ^{2}\]
k=9.0 x 109 N•m2/C2
That should get you through the first 2 questions.
V=IR, P=VI
\[R _{t}=R _{1}R _{_{2}}R _{3}/(R _{1}+R _{_{2}}+R _{3})\]
Which should answer the next three.

Answer 2

#1 & #2: As said by mcgyver \[k=9*10^9\]

#3 R=(R1*R2*R3)/(R1*R2+R2*R3+R3*R1)

#4 I=V/R

#5 P=V*I

Answer 3

1) the value is 9*10^9 and unit is Nm^2/C^2
2) the force between them is 23.04*10^(-38) newton
3) the total resistance is 1.66 ohms
4) the current is 5.4021 amperes
5) the total power is 48.444 watts

Answer 4

Thanks Annand, major gaff; must have been half awake.