Tony Smith wrote:

>>> This is getting as tedious as the 'holes bored in metal get smaller 
>>> when you heat it up' thread on another list.
>> 
>> I'll bite.

Let's chew on it :)

>> The former seems to obey the "laws" of Physics and the latter dinna 
>> then we conclude that holes in a heated piece of metal will expand as 
>> the metal expands to maintain the scale of the heated object.

> Gah!  There's always one in a crowd  :)
> 
> Yep, everything expands proportionally, including the holes (whatever shape
> they may be).  I don't know of any homogenous metal that shrinks when
> heated...
> 
> Some people remain unconvinced of this, no amount of logic or reason will
> sway them.  It gets more frustrating when said skeptic states "Well yes, I
> have heated up metal to be able to get a bearing in or out, but I still
> don't believe the hole gets bigger".  Gadzooks!

Let's say you have a big chunk of metal. And let's say you take a flame to
the immediate neighborhood of the hole. And let's say the chunk itself
(farther away from the hole) stays at room temperature; only the area
around the hole gets heated. Does the hole get bigger? 

Gerhard

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