Question $1$

$0/15$ pts

A thin layer of graphite $(C)$ is plated onto a thick plate of iron and the couple is held at $1,335$ degrees $C$ for some amount of time. If the approximate depth of penetration at which a there is a $30\%$ concentration of $C$ in the thick plate is $106m,$ find the time in seconds The diffusion constants are $D_0=8E-6\frac{m^2}{s}$ and $Qd=131k\frac{J}{m}ol.$

$11\mathrm{.}6589$ margin of error $+/-5\%$