I have had these questions for a very long time so I am finally posting them! I do appreciate your time in responding. The 2 questions concern same-size ice cubes made in a plastic ice tray in the freezer of a home refrigerator, in the U.S.
1)Which ice cube melts faster- an ice cube amongst other ice cubes in a mug of iced tea OR an iced cube or two, naked in a ceramic bowl at room temp of ~ 70 degrees F.
2)Ice cubes produced from a plastic ice tray have 2 distinct layers: The top ~half is clear and very hard. The lower level is 'cloudy' (with tiny bubbles?) and much less hard, much easier to crunch with one's teeth. What and why are the layers like this?
Thx so much, you talented scientific-minded CHs!
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