Thanks a lot robert, good eye! Yes, the video should show Coulomb's constant with times 10 to the nine. The final answer should still be correct since the final answer reflects using times 10 to the nine in the calculation. Thanks for spotting this, I've put revising this video on my to-do list.

## Comments

So k=8.988Nm^2/C^2?, not 8.988 x 10^9 Nm^2/C^2 ?

Thanks a lot robert, good eye! Yes, the video should show Coulomb's constant with times 10 to the nine. The final answer should still be correct since the final answer reflects using times 10 to the nine in the calculation. Thanks for spotting this, I've put revising this video on my to-do list.

Coulomb's constant has been corrected in this video.