Heat & Temperature

Curie Point

Materials lose their magnetic properties when raised past a certain temperature called the curie point. In this exhibit a large magnet attracts a U-shaped piece of metal which is attached to the end of a pendulum. A current is passed through the metal, heating it until its curie point is reached. The pendulum then swings away and the heating is shut off. The visitor is allowed to keep the heating on or off with buttons on the exhibit and also is able to feel the magnetic force diminish as the curie point is reached by feeling the pull on a string tied to the pendulum.