For a copper-silver alloy of composition 51 wt% ag-49 wt% cu and at 775˚c (1425˚f) (see animated figure 9.7) do the following: (a) determine the mass fractions of and phases. mass fraction = [the tolerance is +/- 5.0%.] mass fraction = [the tolerance is +/- 5.0%.] (b) determine the mass fractions of primary and eutectic microconstituents. mass fraction primary = [the tolerance is +/- 5.0%.] mass fraction eutectic = [the tolerance is +/- 5.0%.] (c) determine the mass fraction of eutectic . mass fraction eutectic = [the tolerance is +/- 5.0%.]

And, finally, we are asked to compute the mass fraction of eutectic , We.  This quantity is simply the difference between the mass fractions of total  and primary  as

We = W – W' = 0.796 – 0.734 = 0.062

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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