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.
Answer:
The answer is "is mostly empty space".
Explanation:
In the given question option numbers is defined, so the explanation to this question as follows:
The volume of an element holds one mole at high temperatures. The nuclear mass is usually indicated by mole: cc/mol in the 
. It is also known as a quantity, in which the same molecule was the measured values based on atomic mass as well as the thickness of both, and certain alternatives were wrong which can be explained as follows:
- atom doesn't fill the protons, neutrons, and electrons.
- It can't revolve with outside atoms and electrons.
Answer:
It would be to figure out what cancers someone could exactly so no need for a biopsy
