| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Copper–tungsten |  |  |  |  |  |
| 3 | Composition | Density | Hardness | Resistivity | IACS | Bending strength |
| 4 | wt. % | g/cm3≥ | HB Kgf/mm2≥ | µΩ.cm≤ | %≥ | Mpa≥ |
| 5 | W50/Cu50 | 11.85 | 115 | 3.2 | 54 | – |
| 6 | W55/Cu45 | 12.30 | 125 | 3.5 | 49 | – |
| 7 | W60/Cu40 | 12.75 | 140 | 3.7 | 47 | – |
| 8 | W65/Cu35 | 13.30 | 155 | 3.9 | 44 | – |
| 9 | W70/Cu30 | 13.80 | 175 | 4.1 | 42 | 790 |
| 10 | W75/Cu25 | 14.50 | 195 | 4.5 | 38 | 885 |
| 11 | W80/Cu20 | 15.15 | 220 | 5.0 | 34 | 980 |
| 12 | W85/Cu15 | 15.90 | 240 | 5.7 | 30 | 1080 |
| 13 | W90/Cu10 | 16.75 | 260 | 6.5 | 27 | 1160 |

Question: What is the highest and lowest density of any copper-tungsten mixture?
Answer: The highest density is that of CuW90 with 16.75 g/cm³ and the lowest is 11.85 g/cm³ for CuW50.