03 Dec, 2012
Up and down
PRESENTATION: An open test tube is placed in a plastic bottle with water in it. The test tube has enough air in to float partially in the liquid. When the liquid is subjected to an external pressure by squeezing the bottle, the volume of the trapped air decreases and the tube sinks. When the external pressure stops, the tube rises again.
- An extremely sensitive Cartesian diver, Robert M. Graham, Phys. Teach. 32, 182 (1994)
- … And now a suspended Cartesian diver, Hasan Fakhruddin, Phys. Teach. 49, 58 (2011)