Posted: Jun 22, 2017 7:13 am
zulumoose wrote:Boil some water to degas it then freeze it, should result in significantly clearer ice. See how it floats compared to ordinary gassy ice.
Some pubs do this, the result is absolutely clear ice that appears to float very low, but that might just be because it is less visible.
Displacement volume is not a radically difficult concept, but you do have to have encountered it. Archimedes worked it out and shouted "Eureka!" Even full of air, most of the volume of an iceberg is under water. Surely you've heard of that. How much gas can you trap in an ice cube? How much gas can you dissolve in water? Why does the gas come out of solution when the water freezes? This is interesting shit!
Boats float 'high' because they're full of air. Ice cubes (even those enclosing air bubbles) float 'low' because their density contrast is not so great in water.
So, no. Visibility is not really the issue. I'm still coming to terms with a furor about removing ice cubes from a tray.