Foundation November 2020 Paper 1 Q22
22 This formula converts temperature in degrees Fahrenheit (\(F\)) to kelvin (\(K\))
| \(K = \dfrac{5}{9}(F - 32) + 273\) |
A pottery oven is heated to 2192 degrees Fahrenheit.
Work out this temperature in kelvin. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| 2160 | B1 | may be implied by 240 or 10 800 |
| \(\dfrac{5 \times \text{their } 2160}{9}\) or \(5 \times 240\) or \(10\,800 \div 9\) or 1200 | M1 | oe |
| 1473 | A1 |
Additional guidance
| Accept 0.55 or 0.56 or better for \(\dfrac{5}{9}\) | |
| eg \(\dfrac{5}{9}(2160) + 273\) (no indication that they know to multiply by \(\dfrac{5}{9}\)) eg \(\dfrac{5}{9} \times (2160) + 273\) eg 2130, \(5 \times 2130 \div 9\) | B1M0A0 B1M1A0 B0M1A0 |