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Osmium density: 22.61 g/cm3
Disk: 25cm radius, 5cm thickness:
- Area = pi * r2 = 3.14159265 * 25 * 25 = 1,963.49540625 cm2
- Volume = Area * height = 1,963.49540625 cm2 * 5 cm =
- Osmium mass = Volume * density = 9,817.47703125 cm3 * 22.61 g/cm3 = 221,973.155676563 grams = 221.973155676563 kg = 489.36704003733 pounds [1 kg = 2.20462262 pounds]