Explain how it is possible to skate on ice without leaving a trail behind

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Solution

When u skate on ice and overcome the force of friction u generate energy or heat. This heat generated instantly melts the ice as a skater travels. But because of the refrigeration unit under ice, the section on which they just skated on, refreezes

The trails when you skates quickly re-freezes once you have passed by.

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Explain how is it possible to skate on ice without leaving trail behind

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