From Archimedes’ principle to mass spectrometry, there are plenty of ways to test the purity of gold.
- Professor emeritus, University of Technology Sydney
Jika berdiri sendiri, unsur ini hanyalah timah. Tetapi jika dicampur dengan unsur lain timah dapat membantu pembentukan peradaban kuno.
On its own it’s just tin. But mix it with other elements and it turns into a material that helped shape the ancient world.
What do Casper the Friendly Ghost, Harry Potter and H.G Wells’ Griffin all have in common? The answer, of course, is “the ability to become invisible”. And these three characters weren’t the first to have…
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