An electric discharge machining operation is being performed on tungsten.
(a) Determine the amount of metal removed in the operation after one hour at a discharge amperage = 20 amps.
(b) If the work material were tin, determine the amount of material removed in the same time. Use metric units and express the answer in mm^3.

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?