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Unformatted text preview: energy decrease. (That is, surface energy decreases with an increase in planar density.) 103 Concept Check 4.2 Question: Does the grain size number (n of Equation 4.16) increase or decrease with decreasing grain size? Why? Answer: Taking logarithms of Equation 4.16 and then rearranging such that the grain size number n is the dependent variable leads to the expression n = 1 + log N log 2 Thus, n increases with increasing N . But as N (the average number of grains per square inch at a magnification of 100 times) increases the grain size decreases. In other words, the value of n increases with decreasing grain size....
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- Fall '07