| @ open university - Search X Week 15: Practice quiz (page 4 0 X @ light reflection calculator - Search X Course Hero * + X Cn https://learn2.open.ac.uk/mod/quiz/attempt.php?attempt=5513395&cmid= 1906338&page=3 Not syncing ... T193-22D Home > Week 15 > Week 15: Practice quiz - WEEK 15 Surface engineering and additive manufacturing Week 15: additional resources Week 15: Practice quiz Questions 6 Question 4 Tries remaining: 3 Marked out of 1.00 \\ Flag question 8 In a die-casting of aluminium, heat transfer is limited by the metal-mould interface, which has a heat transfer coefficient K = 1.9 kJm-2K-1 s-1 The following values apply: Finish attempt ... Melting temperature of aluminium, Tm = 933 K Density of solid aluminium, Ps = 2700 kg m-3 Latent heat of fusion of aluminium, hm = 390 kJ kg-1 Given that the thickness of solid aluminium after 17 s is 2.0 cm, use the equation for interface resistance limited solidification S = K(I'm - To) + Pshum to calculate: (i) the gradient of a graph of S against t, in m s-1, to 3 significant figures (ii) the temperature of the mould in C, to the nearest degree (take 0.C = 273 K) Gradient of S against t: m s to 3 s.f. Temperature of mould: C to nearest degree Check Type here to search O w 16:00 15 C Cloudy ~ 2 ) 22/06/2022