Source: cirosantilli/water-compass
= Water compass
We define a "water compass" as a compass made by placing a magnet floating on a water surface to reduce friction and allow it to align with the <Earth's magnetic field>. This is a common children's scientific experiment.
\Video[https://www.youtube.com/watch?v=5FQCEJ8XQYc]
{title=Bar magnet aligns with Earth's magnetic axis by KClassScienceChannel}