Blog

A 90 wt% Pb–10 wt% Sn alloy is heated to 250°C (480°F); at this temperature it is entirely an

What is the weight fraction of the liquid phase for a 55 wt% Ag – 45 wt% Cu alloy at 900°C?

For a Cu-Ni alloy with a composition of 63.8 wt% Ni and 36.2 wt% Cu at 1250°C, what is the composition of

For a lead (Pb) – tin (Sn) alloy with a composition of 25 wt% Sn and 75 wt% Pb, select the phase(s) present and their composition(s) at 200°C from the following choices.

The eutectic composition for the tin-lead system is approximately:

What does the lever rule calculate in a phase diagram?

Using the lead (Pb) – tin (Sn) phase diagram determine which of the following phase(s)/phase combination(s) will present for an alloy of composition 23 wt%Sn – 77 wt%Pb at 250oC?

What is the liquidus temperature for the alloy with 10 wt% Sn and 90 wt% Pb?

What does a phase diagram show?

2) Found: All four of the main readings (Schumacher, Lewis, Percy, Pinckaers) offer solutions to the problems they diagnose in the human condition. Given your summary diagnosis to the condition of human lostness in question 1 above, do one of the following: Option A, B or C: Chart a course correction to lostness by using all the main authors to explain a unified solution to the condition of personal (and thus social) lostness; or if not a solution, because the human condition is insoluble, what resources do the authors we have read recommend for orienting ourselves in the Cosmos?  Option D. What do you prescribe to bring health to a professor (or indeed, his other students) whose sickness may not yet be unto death?