On Sat, Sep 24, 2011 at 8:36 PM, cdb <colin@btech-online.co.uk> wrote:

> You pour equal quantities of hot tea into identical cups.
>
> After pouring cold milk into cup A, the phone rings. You chat for two
> minutes then pour the same quantity of equally cold milk into cup B.
>
> Which cup is now hotter, or are they the same?
>
> (I got this off the ABC website).
>
> Colin
>

I'll have a stab at it.

Let's make some assumptions here about the integrity of the question itself=
..

1. The amount of hot tea isn't specified. Hot tea only adds heat to the cup=
..
Since amount isn't specified, let's assume 0 mols of hot tea.

2. Let's assume the room temperature is 20 degrees, and the "cold" milk is =
5
degrees just before being poured.

So pour some 5 degree milk into cup A. Wait two minutes. Assume the
temperature of cup A is now 3 degrees after being exposed to air. Now pour
cold milk into cup B, the temperature of cup B is 5 degrees. So cup A is of
higher temperature than cup B.

Was this meant to be a "challenge"?
--=20
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