A workshop makes tension braces for reusable display stands. Each brace contains 300 cm3300\,\mathrm{cm^{3}}300cm3 of material and must cost no more than £18.00.
| Material | Density (g/cm3\mathrm{g/cm^{3}}g/cm3) | Tensile strength (MPa) | Cost per kg (£) |
|---|---|---|---|
| Wood | 0.70 | 80 | 9.00 |
| Brass | 8.5 | 350 | 5.00 |
| Bronze | 8.8 | 500 | 8.00 |
| Cupronickel | 8.9 | 450 | 6.00 |
Which material has the greatest tensile strength without exceeding the budget for one brace?
Wood
Cupronickel
Bronze
Brass
136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.