Is it working? Am I like? Yeah, you like it. Okay, so this is an ammeter and well we're just waiting for our lunch in Iceland. As you're earlier, if you've got any questions about Iceland then just ask, okay, put them in the comments below. But I like this because come back close to this camera person because this is an ammeter but it's really exposed the workings of it. The essential part of anything we use to measure any electrical quantity is a galvanometer. You can really see the galvanometer really, really well. You see that spiral of like wire basically, it's a coil of wire that's a spring. And when a current flows through that, it kind of attracts itself and kind of the coil will come closer together. And that is the only way we can actually measure any kind of electrical property. And that's hooked up in such a way as this reads out what the current is. But that galvanometer is important to understand is the essential part of a voltmeter as well. And I really like this because it's an example of why it's a voltmeter as well. And I really like this because it's an example of why we have SI quantities. Okay, they are mass. I'm going to forget some mass length, current and temperature. And there's one more of time. Yeah. And it has to be current because current is something we can measure directly. So all of those five SI quantities are things that we have ways to measure directly. We can measure length directly. We can measure time directly. We can't measure voltage directly. So that's not a SI base quantity. It's an SI derived quantity. So good stuff. So as we've been traveling around Iceland, we've found so much physics going on. We've found refraction when we're talking about glacial, coastal relics, we've found lots of other physics as well. So we've been making some physics videos and uploading them in the future as I go around. So thank you very much. You just pressed the cross-camera lady in our end of screen.