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You know, I've been reading about those tests (which are always worded "can" rather than "do"). They suggest that evaporation can play a role in that (less water in the container due to evap). But my hypothesis would be that when using those thick rubber livestock bowls, the rubber would absorb some of the heat from the hot water (or cold from the cold water), and would help hold whichever temp. stable, longer. Maybe I need to do a test...lol.
We did it as a class experiment. Hot drops temperature faster but never catches up with cold. Result, cold water freezes faster than hot water.
You know, I've been reading about those tests (which are always worded "can" rather than "do"). They suggest that evaporation can play a role in that (less water in the container due to evap). But my hypothesis would be that when using those thick rubber livestock bowls, the rubber would absorb some of the heat from the hot water (or cold from the cold water), and would help hold whichever temp. stable, longer. Maybe I need to do a test...lol.
We did it as a class experiment. Hot drops temperature faster but never catches up with cold. Result, cold water freezes faster than hot water.