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Physics
Classical Physics
Thermodynamics
Filling a bathtub (Hot water to cold water exchange)
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[QUOTE="Vanadium 50, post: 6854316, member: 110252"] This is going to go around in circles with "yeah buts" If it took zero time to fill, it wouldn't matter, right? You're mixing fixed amounts of water at T1 and T2 and it doens't matter which order, since it's instantaneous. But it doesn't. If you put the cold water in first, it warms. If you put the hot water in first, it cools. So the question boils down to which happens faster. That depends on temperature, geometry, humidity, etc. I suspect in all practical cases, the hot water cools faster than the cold water heats, but this will get smothered in yeahbuts. The water in the tank is also heating as the cold water is filling. so there's another universe of yeahbuts to explore. [/QUOTE]
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Thermodynamics
Filling a bathtub (Hot water to cold water exchange)
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