CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY CLAUDE NURIDSANY & MARIE PERENNOU / SCIENCE PHOTO LIBRARY
Density of liquids. Three unmixed coloured fluids of different densities are seen in a cylindrical flask. A distinct boundary defines each liquid. The most dense liquid (green) has settled to the bottom of the flask, with the least dense separated at the top (red).
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