Some time ago, I saw an instructor roll a cylinder on the ground.
When I asked why the instructor was doing this, the instructor said that he checked quickly the gas contents and they got two very different readings when the measured it (apparently the first reading looked wrong so they read again immediately).
The instructor said that the gas wasn't probably mixed (this shop is doing partial fills), so he was trying to help it getting mixed.
This seemed a bit strange to me because I thought that with gases, as long as there would be some movement inside the cylinder, I thought that the gas would start mixing and stay that way (I am not good at physics so correct me if wrong).
Was the instructor correct or is it some kind of urban myth ?
When I asked why the instructor was doing this, the instructor said that he checked quickly the gas contents and they got two very different readings when the measured it (apparently the first reading looked wrong so they read again immediately).
The instructor said that the gas wasn't probably mixed (this shop is doing partial fills), so he was trying to help it getting mixed.
This seemed a bit strange to me because I thought that with gases, as long as there would be some movement inside the cylinder, I thought that the gas would start mixing and stay that way (I am not good at physics so correct me if wrong).
Was the instructor correct or is it some kind of urban myth ?