These more refined needle compasses could then be floated in water (wet compass), placed upon a pointed shaft (dry compass) or suspended from a silk thread. Consequently, they were much more useful ...

The needle will turn and then come to a complete stop. It will be facing magnetic north. You can check this by placing the compass next to the bowl. The needle is being affected by the Earth’s ...

Some of the water will run out of the glass but most ... weak magnetic forces around the axis of spin. The magnetized needle in a compass can detect very slight magnetic fields.

A compass uses a magnetized needle that is constantly drawn to magnetic ... Will it be exposed to water or used in rugged ...