How did the first peoples know which foods were safe to eat? Excellent question! Food historians make educated guesses based on ancient records and modern practices.
When water freezes its entropy decreases. This does not violate the second law of thermodynamics. The second law does not say that entropy can never decrease anywhere. It just says that the total entropy of the universe can never decrease.he entropy increases whenever heat flows from a hot object to a cold object. It increases when ice melts, water is heated, water boils, water evaporates. The entropy increases when a gas flows from a container under high pressure into a region of lower pressure.
To find out if what temperature water will freeze the fastest. Secondly whether a lid over the water will increase the freezing process? Hypothesis: I think hotter water will freeze faster than the colder water. The freezing process will be slower with a lid covering the water. Background Research: Hotter water freezes faster than colder water in some circumstances. This phenomenon is called the Mpemba effect.