<font color="yellow">Thanks for clearing that one up pizza guy, and for everyone else thanks for the help anyways, so now i know electricity is almost the speed of light, correct? </font><br />It sure is. <br /><br />Let's say you are sending very high frequency ac electricity (also known as RF or radio) thru that old TV twinlead lead-in wire from your TV antenna. The signal, an AC current, moves along the line at .82 to .95 of lightspeed in free space. (The exact number depends on exactly which line you are using, and what kind of web or spacer is used between the wires.)<br /><br />If you switch over to coax cable (RG-6 or RG-59) it will slow to .66 to .79 - depending again on exactly which cable you are using and what dielectric is used in that cable. <br /><br />If you hook a BATTERY up to it, then what the line is made of no longer matters, 'cause DC is simpler. To be honest, I cannot answer for certain, but would certainly think it's VERY CLOSE to lightspeed. But I will stop right there, I'd rather give a partial answer, than an incorrect one.<br /><br />Now, remember, the electrons themselves are moving real slow, but the effect of them 'pushing' on each other travels along the line at the speeds indicated above. (If you apply a voltage at one end, it is 'felt' at the other end at near light speed'.) So we get away with saying that electricity (which is the MOVING of electrons) moves very fast, indeed. <br /><br />Thanks for the question - there are few questions on SDC that I can answer! (There are many <i>questions</i> here that I cannot even <i>understand</i>... <img src="/images/icons/crazy.gif" /> like quantum mechanics, black holes and all this orbital dynamics stuff. )<br /><br /> <div class="Discussion_UserSignature"> <font size="1"><em>Note to Dr. Henry: The testosterone shots are working!</em></font> </div>