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9 January 2018, 16:01 | Updated: 9 January 2018, 16:27
Mystery Hour Question
At what point does a liquid become a solid?
Name: Calum, Liverpool.
Qualification: Chemical Engineering student.
Answer: There is no one answer to this question! A liquid become a solid when its viscosity is 0. This is different for every substance. There is no period of transition and no point when something is more solid than liquid. It is either one or the other.