Two channels are welded to a dx 12-in. steel plate as shown. Determine the width d for which the ratio Ix /ly of the centroidal moments of inertia of the section is 16. channel section 0.24" 2.60" 0.436" tw d 6 in. tf bf C10 x 15.3 10" C 6 in.

Question 3 For a 40 wt% Sn-60 wt% Pb alloy at 150 °C and taking the densities of Pb and Sn at 150 °C to be 11.23 and 7.24 g/cm?, respectively. Composition Cats Sn) 20 60 100 327C 600 300 Liquid 500 232'C 200 400 183°C 18.3 61.9 97.8 300 100 200 100 60 80 100 (Pb) Composition (wt% Sn) (Sn) The lead-tin phase diagram a) AN6 marks b) W c) calculate raction. CROmarks d) calculate the relative amount of each phase present in terms of mass fraction volume fraction Temperature ("C) Temperature (F)