Soft copper wire for rings with diameter 1.5cm 20 gauge (wire diameter 0.8mm): 40cm (16 inch) If you are making 1.5cm larger diameter ring, cut a longer piece of wire. Can make straight or zigzag ...
Researchers from Vanderbilt University in Nashville, Tennessee have created the world's smallest continuous spirals. Made from gold, the spirals exhibit a set of very specific optical properties that ...
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