The Mpemba Effect..

simple application of Newton's Law of cooling (derived from Stefan's law)

I think it is not right..because after sometime both temparature will be same..still the hot water freezes first..

also see- Leidenfrost effect.

And yes, asish bhai is correct.

@Asish,
Its a common misconception, but you should note that the Newton's law of cooling is not "derived" from Stefan's law. The very fact that its a law (and not a theorem) means that it cannot be derived. Further, Newton's law of cooling is a convection phenomena while Stefan's law deals with radiation phenomena. So how could you derive Newton's law of cooling from Stefan's law.

agree with kaymant sir
how cud newtons law of cooling be derived frm stefans law