You are thinking of the sensor in smartphones, in this case it is a spinning disc that uses gyroscopic torque to rotate the spacecraft.
20 karma · joined February 10, 2020
The point is that it is beneficial to store the energy as Aluminium instead of hydrogen gas.
My university examiners always ave at my presentations.
I'm very happy using this tool, but I have to admit you need to be HTML savvy to be really productive. For me the WYSIWYG editors are surely a stepdown for now, and sadly I haven't seen much improvement recently.