手濕嗰時吹風

我相信你用中文問會想有中文的回答~
濕了的時候之所以會乾是因為水份從外間吸收了能量所以氣化了,
而那些能量可能來自空氣同埋我地手的體溫。
而氣化的速度取決於濕度同埋溫度,
愈熱同愈乾就會氣化得愈快,
吹風就可以減少了因為水份氣化後所提升了的濕度,
簡單來說就係用周圍的空氣取代了濕了的空氣~
所以可以乾快d

This is because of "forced evaporation".
Water molecules with sufficient high energy will escape into the air. This is evaporation. If these escaped water molecules remain above the water on your hand, they will have a chance to return onto the water on your hand because of cohesive force between water molecules.
A blowing wind helps to carry the escaped water molecules away from your wet hand so that they will not be able to go back onto your hand. Thus evaporation goes faster if there is a wind blowing, your hand will be dried more quickly