While instructing an Eddy Current class...
oih82w8
Posts: 12,277 ✭✭✭✭✭
...the conductivity unit was discussed. I used some change from my pocket, including my Barber Half Dollar to demonstrate a conductivity curve with the inspection instrument. A nice representation was provided on screen for the students to observe which included a copper cent, copper-nickle 5 &10 cent and my silver half dollar. I asked if anyone had another metallic object that they wanted yo be measured and a student brought up a RMO (round metallic object/challenge coin). I measured it using the same scale and it was on the low conductivity range. Another student asked what was made of, which I explained that conductivity testing can "sort" metals by their conductivity rating rather that identify, since metals may have similar apparenances but may have a great variances in electrical conductivity. Another student chimed in and said that it was probably mass produced out of "chinesium". This was the first time I heard of this "material", but it the description is out there in a "slang" dictionary.
I just thought that I would share.
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Comments
Well now... while not an element, the description is quite suitable for the purpose. Thank you for my second learning experience today.
Cheers, RickO