4 ms·

I think the guy needs to read a bit more physics. Electricity travels at about 2/3 the speed of light in copper wires.

• jimdigriz 7y ago
  ...and once you learn about physics you find out about orders of magnitude.
• dekhn 7y ago
  To be pedantic: electrical signals travel at that speed; the electrons themselves mostly drift around in place with a very low net velocity. https://en.wikipedia.org/wiki/Speed_of_electricity https://en.wikipedia.org/wiki/Speed_of_electricity