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General Science / Re: What freezes first, hot or cold water ?
« on: 14/03/2005 20:00:39 »
2 identical air-tight glass containers
117g distilled water in each container (warm water was not boiled)
Digital thermometers with remote sensors
Freezer at -16.6 Celsius
Temperature recorded by remote sensors without disturbing the containers or opening freezer.
Freezing defined as zero degrees, at which time the freezer was entered and containers retrieved.
1st run:
Initial temperature: Warm water 46.9 , Cold water 12.0
No contest. Cold reached zero first. (halted before Warm allowed to reach zero)
2nd run:
Initial temperature: Warm water 33.4, Cold water 12.3
Cold beat warm by 1 min 13 sec.
3rd run:
Initial temperature: Warm water 23.8, Cold water 11.5
Warm beat cold by 1 min 47 sec.
117g distilled water in each container (warm water was not boiled)
Digital thermometers with remote sensors
Freezer at -16.6 Celsius
Temperature recorded by remote sensors without disturbing the containers or opening freezer.
Freezing defined as zero degrees, at which time the freezer was entered and containers retrieved.
1st run:
Initial temperature: Warm water 46.9 , Cold water 12.0
No contest. Cold reached zero first. (halted before Warm allowed to reach zero)
2nd run:
Initial temperature: Warm water 33.4, Cold water 12.3
Cold beat warm by 1 min 13 sec.
3rd run:
Initial temperature: Warm water 23.8, Cold water 11.5
Warm beat cold by 1 min 47 sec.