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Oct 23, 2021 at 14:12 comment added silverbackgorilla Thanks for the answer. So basically, if we model a fluid as being made up of very small objects called fluid elements (instead of molecules), each with assigned values for properties like temperature, pressure, etc., we can model a fluid as a continuous function in space, to which methods of calculus can be applied. And also, by making them large enough such that their properties are unaffected by molecular fluctuations guarantees that properties will vary smoothly in space. Is that a correct interpretation of your answer? Thanks
Oct 22, 2021 at 8:09 history edited Roger V. CC BY-SA 4.0
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Oct 22, 2021 at 6:46 history answered Roger V. CC BY-SA 4.0