A group of friends decides to dip in a hot tub. They find that after spending time in the water, they all reach a similar body temperature. Which law of thermodynamics explains this phenomenon? *First law of thermodynamicsSecond law of thermodynamicsThird law of thermodynamicsZeroth law of thermodynamics
Question
A group of friends decides to dip in a hot tub. They find that after spending time in the water, they all reach a similar body temperature. Which law of thermodynamics explains this phenomenon? *First law of thermodynamicsSecond law of thermodynamicsThird law of thermodynamicsZeroth law of thermodynamics
Solution
The phenomenon described in the question is best explained by the Zeroth Law of Thermodynamics. This law states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other. In the context of the hot tub, each person (system) is in thermal equilibrium with the hot tub (third system), so they eventually reach a similar body temperature (thermal equilibrium with each other).
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