Final answer:
Ice packs must be approved and as cold as -0.001 °C to +0.001 °C in order to effectively cool down objects.
Step-by-step explanation:
Ice packs must be approved and as cold as -0.001 °C to +0.001 °C. Ice packs are used to cool down the temperature of objects or substances that need to be kept cold, such as food or medications. By placing ice packs in contact with these items, the heat from the objects is transferred to the ice packs, causing the ice to melt and absorbing the energy in the process.