Cylindrical body to demonstrate the temperature dependence of buoyancy.

If the body is placed in a vessel filled with cold (approx. 10 °C) water, the body will float.

If the body is placed in a vessel filled with hot (ca. 90 °C) water, the body sinks to the bottom.

At a temperature of about 50 °C, the body begins to rise to the surface in the vessel.