s ▁have ▁disappeared . ▁ ▁Notes ▁ ▁Category : Ital ian ▁chron ic lers ▁Category : 1 5 th - century ▁histor ians ▁Category : Pe ople ▁from ▁Ven ice ▁Category : 1 4 2 8 ▁birth s ▁Category : 1 5 1 5 ▁death s ▁Category : Ital ian ▁sail ors <0x0A> </s> ▁The ▁contact ▁angle ▁is ▁the ▁angle , ▁convention ally ▁measured ▁through ▁the ▁liquid , ▁where ▁a ▁liquid – v apor ▁interface ▁meets ▁a ▁solid ▁surface . ▁It ▁quant ifies ▁the ▁w ett ability ▁of ▁a ▁solid ▁surface ▁by ▁a ▁liquid ▁via ▁the ▁Young ▁equation . ▁A ▁given ▁system ▁of ▁solid , ▁liquid , ▁and ▁v apor ▁at ▁a ▁given ▁temperature ▁and ▁pressure ▁has ▁a ▁unique ▁equilibrium ▁contact ▁angle . ▁However , ▁in ▁practice ▁a ▁dynamic ▁phenomen on ▁of ▁contact ▁angle ▁h yst er esis ▁is ▁often ▁observed , ▁r anging ▁from ▁the ▁adv ancing ▁( maxim al ) ▁contact ▁angle ▁to ▁the ▁re ced ing ▁( min imal ) ▁contact ▁angle . ▁The ▁equilibrium ▁contact ▁is ▁within ▁those ▁values , ▁and ▁can ▁be ▁calculated ▁from ▁them . ▁The ▁equilibrium ▁contact ▁angle ▁reflect s ▁the ▁relative ▁strength ▁of ▁the ▁liquid , ▁solid , ▁and ▁v ap our ▁mole cular ▁interaction . ▁ ▁Th erm od ynam ics ▁ ▁The ▁shape ▁of ▁a ▁liquid – v apor ▁interface ▁is ▁determined ▁by ▁the ▁Young – D u pr é ▁equation , ▁with ▁the ▁contact ▁angle ▁playing ▁the ▁role ▁of ▁a ▁boundary ▁condition ▁via ▁the ▁Young ▁equation . ▁ ▁The ▁theoretical ▁description ▁of