Explain why the water in a cup placed in a small ice chest (without a refrigeration mechanism) initially at –5 °C does not freeze.
There is nothing magic about absolute zero. In fact, it's not even a real, valid temperature - you can never cool anything down to absolute zero. You can reach temperatures arbitrarily close to absolute zero, but under no circumstances could you ever cool an ice cube (or any object) down to that temperature.
Supposing you could, however, your glass of water would still not freeze instantly. As soon as you dropped the ice in the water, heat would begin to move from the water into the ice. If the glass...