The relationship between na, ac, and n is ____
a) na=n*ac
b) na=n/ac
c) na=n+ac
d) na=n-ac
Answer: a
Explanation: The percentage air voids is given by,
ac = \(\frac{V_a}{V_v}\) and n = \(\frac{V_v}{V}\)
na = \(\frac{V_a}{V}\) = n * ac.
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