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This video clip allegedly shows an otherwise unspecified ice cube that turns red hot (and burns) due to induction heating.

Can somebody explain how this works?

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3 Answers 3

up vote 5 down vote accepted

The video was taken at the the EMO (which translates as "Machine Tool World Exposition") in Hannover at the booth of the company Huettinger. They have a video on their website where they show how its done: As already suspected, there is a metal piece inside the ice that is heated via induction. Towards the end of the video you can see that the glow comes from the red-hot metal, not from the ice itself.

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Yes, it's a magic trick. Maybe the ice is actually housing a metallic substance which is being heated by induction. I'm no expert, as you may have deduced, but creating those kinds of currents and passing that current through a block of ice and seeing it become red hot? Something tells me this is an intelligent trick

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Or it's magnets. I know it makes no sense in the context but every magic trick, illusion or stunt ever done is magnets. –  Jason Jul 2 '13 at 14:34
    
Where did you hear that!? xD –  mikhailcazi Jul 2 '13 at 14:36
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From some drunk guy at a magic show once who couldn't figure out how any of the tricks were being done so just repeatedly shouted "It's magnets!" at the magician. –  Jason Jul 2 '13 at 14:38
    
Not much of an answer. But funny comments. (about magnets.).... –  Dimensio1n0 Jul 2 '13 at 15:41
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@dimension10 thank you; but I though the answer was actually informative, I called the metal inside it. –  Jason Jul 3 '13 at 8:27

Temperature = energy of molecular motion. Higher temperature = higher motion. At some point, known as melting point, kinetic energy of molecules becomes so strong that crystal forces cannot keep the molecules together and crystal desintegrates.

Because temperature destroys the crystallic structure, you cannot have temperature of ice be higher than its melting point. Since red-hot implies higher temperature, we can say that red-hot (> 100°C) ice is impossible. Might be they have some parts of the ice body evaporating while the rest is still at low temperatures.

Actually metal is also a crystal and you can have it red-hot. But, in your case you mean temperatures higher than melting points. You actually ask can we have cold warm? Cold heat is an oxymoron. What you ask is "Do oxymorons exist?"

Might be it was inductive but not heating. Heating means "increased temperature". Increased temperature must cause ice melting. If this does not happen, we did not have the any heating.

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