Floating Squares - Hexane and Water
A paper square rubbed with graphite on one side is placed at the interface between two immiscible liquids, hexane and water.
density
Ice Bomb
A cast iron bomb is completely filled with ice water, then placed into a dry-ice/acetone slush and covered with a wooden box. When the water in the bomb freezes, the cast iron bomb explodes, breaking into several pieces, and destroying the box in which it was placed.
Heavy Water Ice Cubes - Water
An ice cube made from normal water floats in a beaker of liquid water.
Heavy Water Ice Cubes - Deuterium Oxide
An ice cube of deuterium oxide (containing a heavier isotope of hydrogen) sinks in water.
Heavy Water Ice Cubes - Comparison 1
A normal ice cube is less dense than liquid water, but a deuterium oxide ice cube is more dense than liquid water.
Heavy Water Ice Cubes - Comparison 2
An H2O ice cube is less dense than liquid water, but a D2O ice cube is more dense than liquid water.
Floating Squares - Introduction
Introduction to the floating squares demonstration shows the preparation of the square of paper rubbed with graphite on one side.
Floating Squares - Carbon Tetrachloride and Water
A paper square rubbed with graphite on one side is placed at the interface between two immiscible liquids (carbon tetrachloride and water).
Fluidity of carbon dioxide gas
Carbon dioxide gas is poured down a covered trough with candles inside.
Fluidity of methane gas
Methane gas from a beaker flows up a covered trough to a candle flame.