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.
Wholesalers acquire goods from manufacturers, farmers or miners, holds them then distributes them to retailers.
All options in the Advanced tab in the Share Workbook dialog box.
- Don’t keep change history
- Show comments made by all users
- Update changes when file is saved
- Track changes for certain amount of days
- Allow changes by more than one user at a time
- Automatically update changes in certain time periods
<u>Explanation:</u>
In shared workbook in advanced tab it has following options. Based on end user selection changes are applied on shares workbook.
1. Either keep the history for certain period or don’t keep the history on shared workbook.
2. On share work Save changes on period schedule (automatically update) or just see other user changes.
3. Before changes are made for share workbook either prompt for save option or last modified saved.
4. Printer review and filter setting for personal view.
National FFA is the answer to your question my guy.
Answer:
its okay. i mean like you have to do a bunch off stuff. andsomtimes it gets a little boring.
Explanation:
i am doing online school.
