J is for Joule

automatic captions, checked for structure and key terms; corrections welcome

[00:00:00.000] Rise and shine, Adabot. It's time for work.
[00:00:07.000] Work? Work!
[00:00:08.660] Uh, okay.
[00:00:43.720] Who are you? And what are we working on?
[00:00:47.020] My name is James Prescott Joule. Perhaps you've heard of me.
[00:00:51.100] I think so. Aren't you a scientist?
[00:00:54.040] Exactly. And I've spent my entire life studying the way things work.
[00:00:59.140] What do you mean by work, exactly?
[00:01:02.280] I'm so happy you asked. Let's get working and I'll explain.
[00:01:07.680] Um, okay.
[00:01:13.280] Long ago, I defined work as force multiplied by distance.
[00:01:18.780] So, if we know how much force has been applied over a certain distance,
[00:01:23.520] then we can know how much work has been accomplished.
[00:01:27.860] Force multiplied by distance?
[00:01:31.140] Exactly!
[00:01:31.980] As I'm sure you know, it takes much more work to lift something up above your head
[00:01:36.840] than it does to raise it a few inches off the ground.
[00:01:40.140] And when we measure force multiplied by distance,
[00:01:43.780] we do so using a unit of measurement known as the joule.
[00:01:48.020] Wait, I thought you were named Joule.
[00:01:50.900] I am. I named the unit of measurement after myself.
[00:01:54.820] It is my life's work after all.
[00:01:58.240] That makes sense.
[00:01:59.720] Let me give you an example.
[00:02:01.420] Okay.
[00:02:02.540] To the table.
[00:02:03.640] To the table.
[00:02:08.140] Ooh, how about them apples?
[00:02:10.680] Indeed, Adabot.
[00:02:12.620] So it takes a force of about one newton to lift this apple.
[00:02:16.500] And if I lift this apple one meter, then I've done one joule of work.
[00:02:21.740] Okay, but what if you lifted 40 apples?
[00:02:25.840] Forty apples would be 40 joules of work!
[00:02:29.220] Whoa, that's a lot of work.
[00:02:30.880] Indeed.
[00:02:31.900] Indeed.
[00:02:34.900] So, if we light this 3 watt LED for 3 seconds, then we've done
[00:02:40.540] 9 joules of work.
[00:02:42.960] 3 watts times 3 seconds equals 9 joules.
[00:02:47.200] Now similarly, if we light this 60 watt incandescent bulb for 1
[00:02:53.080] hour, then we'll have done 216,000 joules of work.
[00:02:59.360] Whoa, that's a lot of joules.
[00:03:01.480] Exactly. So, if you really wanted to save power, you might consider using
[00:03:06.140] something like this, a 12-watt LED bulb.
[00:03:10.820] Oh, that would be a smart move.
[00:03:13.140] Indeed, Adabot.
[00:03:14.860] So, to calculate joules, we multiply force
[00:03:20.660] and distance, or power and time.
[00:03:27.060] Precisely, Adabot.
[00:03:29.980] So, are you ready to get to work?
[00:03:32.360] I think so.
[00:03:33.620] Good, because we're scheduled for 5,000 joules of work today.
[00:03:38.400] Wait, what?
[00:03:39.780] Come on, Adabot. Let's make hay while the sun is shining.
[00:03:42.960] Wait, there's hay now too?
[00:03:44.400] Oh, it's just an expression, Adabot. Come on!