Answer:
a) D = 4.88 * 10^(-14) m^2 / s
b) <em>t </em>= 1.1 hr
Solution:
a) Magnesium in Aluminum diffusion:
D = Do * exp(-Qd / RT)
= (1.2 * 10^(-4) m^2 / s) * exp ( - 130,000 / 8.31 * 723.15)
= 4.88 * 10^(-14) m^2 / s
D = 4.88 * 10^(-14) m^2 / s
b) The composition remains same at say the distance Xo:
(Cx - Co) / (Cs - Co) = Constant
Xo^2 / D_{550} * <em>t </em>= Xo^2 / D_{450} * 15
D_{550} * <em>t </em>= D_{450} * 15
(1.2 * 10^(-4) m^2 / s) * exp ( - 130,000 / 8.31 * 723.15) * <em>t</em>
(4.88 * 10^(-14) m^2 / s) * 15
by, solving for <em>t </em>we get:
<em>t </em>= 1.1 hr
So, the time required is 1.1 hr.
the answer to this is 2 and 3
Hope this helped
-scav
False.................................
Answer:
Boot partition and system partition
Explanation:
System partition is the primary partition that is used as the active boot partition,it saves boot files and all files that will be used. System partition is also known as the system directory or root directory and is usually given the identifier "c"
Boot partition is the disk partition that holds the files for the operating system files Windows operating system (either XP, Vista, 7, 8, 8.1 or 10), it works with the system partition and tells the computer where to look when starting. It given the identifier of letter "D" or "E"