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Answer to Question #69994 in Molecular Physics | Thermodynamics for Ansari

Question #69994
Two persons ordered two cups of hot tea in a cafe while waiting for a third friend. One of them immediately poured tea in his cup and mix cold milk with it. The other person poured tea immediately but mixed cold milk after the friend arrived. Who drinks warmer tea?
Expert's answer
Newton's Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature. According to this law, the difference between temperatures will be more in cup of tea in second case. Therefore, a hot tea will be colder in cup of the second person. In this way, the first person will drink warmer tea.
The first person will drink warmer tea.

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