What is the empirical relationship for the rate of neck growth when two spheres are in contact with one another?

\(\frac{x^5}{a^3}=\frac{40\gamma \Omega D.t}{RT}\)

\(\frac{x^7}{a^4}=\frac{40\gamma \Omega D.t}{RT}\)

\(\frac{a^2}{x^5}=\frac{400 \gamma \Omega D.t}{RT}\)

\(\frac{x^5}{a^2}=\frac{40\gamma\Omega D.t}{RT}\)

\(\frac{x^5}{a^3}=\frac{40\gamma \Omega D.t}{RT}\)

What is the empirical relationship for the rate of neck growth when t

1.	What is the empirical relationship for the rate of neck growth when two spheres are in contact with one another?
A.	\(\frac{x^7}{a^4}=\frac{40\gamma \Omega D.t}{RT}\)
B.	\(\frac{a^2}{x^5}=\frac{400 \gamma \Omega D.t}{RT}\)
C.	\(\frac{x^5}{a^2}=\frac{40\gamma\Omega D.t}{RT}\)
D.	\(\frac{x^5}{a^3}=\frac{40\gamma \Omega D.t}{RT}\)
Answer» D. \(\frac{x^5}{a^3}=\frac{40\gamma \Omega D.t}{RT}\)