Electric flux through one face of the cube.

[musicman05]

A point charge Q = 5.00 µC is located at the center of a cube of side L= 0.120 m. In addition, six other identical point charges having q = -0.50 µC are positioned symmetrically around Q, as shown in Figure P24.19. Determine the electric flux through one face of the cube.

 

[Snazzy]

Okay, so what have you done so far?

 

[pam]

Use Gauss's law and the symmetry of a cube.

 

[human_eraser]

same sort of question, is L not needed for the calculation?
can someone check my work,
Q=5.17 uC
q=-1.10 uC
L= 0.124 m
Qnet=Q+(1/6)q
flux=Qnet/epsilon
per side=flux/6
26900 N*m^2/C?