What did Charles Édouard Guillaume discover?
Quantum Theory
Anomalies in nickel steel alloys
Relativity
DNA
Answer
Anomalies in nickel steel alloys were discovered by Charles Édouard Guillaume. These alloys exhibited unusual properties, such as a near-zero coefficient of thermal expansion, making them valuable for precision instruments. Guillaume's discovery led to the development of invar, a nickel-iron alloy with a very low thermal expansion coefficient, and elinvar, a nickel-chromium-iron alloy with a low modulus of elasticity and a high resistance to temperature changes.
Unraveling the Genius: The Life and Legacy of Charles Édouard Guillaume
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