點解吹下杯熱飲，杯野會快D涼?

熱,温度高也,也代表內在能量高 High Internal energy,
The universe tends to go to a loss-disorder simple way,
so the internal energy away flow from a high stage body to a low stage body.

物体內能量流失於五種途徑:

熔解melting
蒸發vaporization
對流,current
接觸,contact
幅射,radiation

吹杯熱飲,增加蒸發及對流量,如此快涼也!

2008-11-10 11:52:06 補充：
contact = conduction
melting is oppsite to consolidation, if some part of a subject melt, the remind part of the subject temperture and internal energy decrease.
vaporization is opposite to condensation.

你吹佢咪涼lor
係啊!
真係可以吹走d熱氣