In a message dated 98-01-22 10:00:06 EST, gardner7@pilot.infi.net writes:
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Also,
I give you two cylinders, both identical in appearance and weight.
One is made of aluminum, and is solid. The other is made of gold,
and has the center hollowed out (outside surfaces are unbroken,
however.) Both are painted an identical non-conducting British
Racing Green (obligatory lame attempt at LBC content).
Performing only non-destructive testing, with materials/methods
available in the typical household, how can you tell which cylinder
is which? Tapping on the cylinders with a mallet produces identical
sounds.
Scott
>>
X-ray those puppies!
Tom Green
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