Way back in the
1950’s an ex World War II veteran owned an ice cream bar in Kansas which he
bought with his military pay. Omar Knedlik was a successful businessman and
later bought the Dairy Queen store in Coffeyville. However, just after he
bought it the soda fountain broke, and there he was in the Kansas summer
without any cold drinks. Somewhat in desperation, he ordered in some soda
bottles and put them into his freezer. What he found was that when he opened
them the soda immediately turned slushy. Believe it or not, this was the event
that created slush maker machines.
What is going on
here? What Knedlik had done, without knowing it, was to create a super-cooled
liquid. The soda was actually colder than the point at which it transforms into
ice, yet it hadn’t frozen. There is some science behind this. What happens is
that for ice to form it has to have somewhere to start. That could be a tiny
piece of dust or a rough spot in the glass of the bottle. If that isn’t
present, the soda just keeps getting colder without actually freezing.
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