The total energy from an isolated system is constant; energy can be changed from one form to another, but can't be created or destroyed.
A layer of ice on the surface keeps the water temperature warmer than the air temperature.
Answer: Sustainable
Explanation:
Once a product can serve the present moment and remain useful for an indefinite period without polluting the environment, or getting reduced in value, it can be said to be SUSTAINABLE.
Answer:
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Explanation:
