1 00:00:15,966 --> 00:00:18,435 Maybe you've noticed, 2 00:00:18,435 --> 00:00:21,571 but wires are really important to us. 3 00:00:21,571 --> 00:00:23,473 We use them a lot. 4 00:00:23,473 --> 00:00:27,877 And so, I you just saw in a cartoon with electrons. 5 00:00:27,877 --> 00:00:31,748 Here is a cartoon that I thought was interesting that 6 00:00:31,748 --> 00:00:34,317 shows a wire-pulling setup. 7 00:00:34,317 --> 00:00:37,420 So, now this is-- 8 00:00:37,420 --> 00:00:39,155 Die, reducing the diameter. 9 00:00:39,155 --> 00:00:40,023 That's a die. 10 00:00:40,023 --> 00:00:43,827 Further reduction can take place using extra dies. 11 00:00:43,827 --> 00:00:47,597 The drawn wire is finally wound on a spool. 12 00:00:47,597 --> 00:00:50,900 This transformation elongates the wire. 13 00:00:50,900 --> 00:00:55,905 One meter of 5.5-millimeter wire rod can be drawn to 30 meters 14 00:00:55,905 --> 00:01:01,411 with one millimeter diameter or 484 meters with 0.25 15 00:01:01,411 --> 00:01:03,079 millimeters diameter. 16 00:01:03,079 --> 00:01:03,580 OK. 17 00:01:03,580 --> 00:01:09,652 Now, that is a cartoon, and I think it's always good. 18 00:01:09,652 --> 00:01:12,589 When you see cartoons like this, you don't know. 19 00:01:12,589 --> 00:01:15,258 Go look up what the real deal is. 20 00:01:15,258 --> 00:01:17,293 What does it really look like to draw wires? 21 00:01:17,293 --> 00:01:19,295 And I found it pretty cool. 22 00:01:19,295 --> 00:01:22,632 So this is an actual wire-drawing plant, 23 00:01:22,632 --> 00:01:24,134 and this is what it looks like. 24 00:01:24,134 --> 00:01:25,935 Now, there's no audio here, but I just 25 00:01:25,935 --> 00:01:27,337 wanted to show you the magnitude. 26 00:01:27,337 --> 00:01:30,673 Those are huge towers that are melting metals 27 00:01:30,673 --> 00:01:34,944 to give you this first rod, and then it goes through one 28 00:01:34,944 --> 00:01:35,678 after the other. 29 00:01:35,678 --> 00:01:37,213 And look at it being pulled-- 30 00:01:37,213 --> 00:01:38,914 being pulled in at some diameter, 31 00:01:38,914 --> 00:01:41,017 and it comes out in a different diameter. 32 00:01:41,017 --> 00:01:45,521 But I wanted to show you the scope and size of this. 33 00:01:45,521 --> 00:01:46,556 This is just one of them. 34 00:01:46,556 --> 00:01:51,127 There's a person, and so you get a sense of the size, 35 00:01:51,127 --> 00:01:52,662 and then you can also see something-- 36 00:01:52,662 --> 00:01:54,597 when you go visit these factories, 37 00:01:54,597 --> 00:01:56,332 and I have these factories, there's 38 00:01:56,332 --> 00:01:57,700 always a lot of this happening. 39 00:01:57,700 --> 00:01:58,201 Why? 40 00:01:58,201 --> 00:02:00,870 Things are getting really hot. 41 00:02:00,870 --> 00:02:04,174 When you're spinning things like a wire at a very high velocity, 42 00:02:04,174 --> 00:02:07,010 things heat up, so you get water all over the place. 43 00:02:07,010 --> 00:02:10,880 So there's water being sprayed in factories 44 00:02:10,880 --> 00:02:13,349 all over the place, because you've got to keep stuff cool, 45 00:02:13,349 --> 00:02:16,953 or there's water baths that you run these things through. 46 00:02:16,953 --> 00:02:18,655 And then you've got to think about, well, 47 00:02:18,655 --> 00:02:21,057 does this thing interact with water? 48 00:02:21,057 --> 00:02:22,559 How does the water play a role? 49 00:02:22,559 --> 00:02:25,061 It all comes down to the electrons. 50 00:02:25,061 --> 00:02:27,329 And once they've actually drawn the wire out 51 00:02:27,329 --> 00:02:29,899 over this huge factory, they can actually 52 00:02:29,899 --> 00:02:30,867 weave it back together. 53 00:02:30,867 --> 00:02:31,701 So I found this. 54 00:02:31,701 --> 00:02:33,269 This is the same factory. 55 00:02:33,269 --> 00:02:36,372 Now these things here are doing the opposite. 56 00:02:36,372 --> 00:02:39,509 So these are huge drums, about the size of a person, 57 00:02:39,509 --> 00:02:44,481 and each of these got a wire that was drawn. 58 00:02:44,481 --> 00:02:47,984 And now, again, because of the ductility, 59 00:02:47,984 --> 00:02:50,987 you can also move the wires, play with the wires, 60 00:02:50,987 --> 00:02:52,322 and you can weave them together. 61 00:02:52,322 --> 00:02:54,057 You can weave them right back together 62 00:02:54,057 --> 00:02:56,326 into a thread that looks like that, which we all have 63 00:02:56,326 --> 00:02:59,762 seen I think many, many times. 64 00:02:59,762 --> 00:03:03,299 All of this processing, all of this manufacturability, 65 00:03:03,299 --> 00:03:05,835 has to do with the electron sea. 66 00:03:05,835 --> 00:03:08,771 That's why we have wires 67 00:03:08,771 --> 00:03:09,372 OK.