Cats can stretch their arms and legs and become a thin cylinder, they can also fit into tight cans, which make them seem like liquid. Of course, cats are solid. In order to define whether an objective is of solid, liquid or gas state, we can use the Deborah number in fluid dynamics. How can the biblical number define the states of objects?
The video is produced by STEM Initiative Hong Kong. Contents are proofread with the assistance of Croucher Scholars.