How does ice melting keep food cold?

The cold is transferred to the food via the process of conduction heat transfer.

Using the drain to remove the melted water means more insulating air and solid ice in the cooler to maintain cold contents, and longer lasting ice. The ice touching the food will not impart any heat energy because it's the same temperature.

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;

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