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11 ώρες πριν · Their respective densities of 1.7, 2.7, and 4.5 g/cm 3 can be compared to those of the older structural metals, like iron at 7.9 and copper at 8.9 g/cm 3. An iron ball would thus weigh about as much as three aluminum balls of equal volume. A metal rod with a hot-worked eyelet. Hot-working exploits the capacity of metal to be plastically deformed.
