• A diecast component has a mass of 1.2 kg and density 7150kg / (m ^ 3) with surface area of 0.075m ^ 2 The thermal conductivity of the material is 95W / m * K and the specific heat is 385 J / k * gl It comes out of the machine at 345°C and is exposed to air at 20°C with a convective heat transfer coefficient of 56.8W / (m ^ 2) * K Determine (1) The temperature of the part after 5 minutes (ii) The time required to reach 50°C (iii) The time constant (iv) The value of convective heat transfer coefficient up to which the lumped parameter model can be used (v) The volume/area ratio up to which the lumped parameter model can be used.