Consider pb-70% sn alloy. determine (i) the composition of the first solid to form during solidification. (ii) the amounts and composition of each phase at 184°c. (iii) the amount and composition of each phase at 182°c. (iv) the amounts and compositions of each microconstituent at 182°c.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.