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.
Have you ever tried to learn a new language or do you have friends who've had that experience?
Yes, I tried to learn Python and I even managed to do two Discord bots which are (somewhat) functional, but I'm far to say that I've managed to lean the language completly. There are lots of things to learn on a language as Python.
I also leant PHP on my own and managed to do a website (somehow) functional.
What are some of the steps you would take to learn a new language, and what are some challenges that might arise?
The first steps in learning any computer language is learning the syntax. If you manage to do that, with the experience you gained from previous projects/languages you might be able to create something working. At times you might feel down if the project doesn't work as expected.
What are some things that can help make the process easier?
Video tutorials, experiments and searching questions and problems on Google is a very important resource.
Answer:
The code is not dereferencing the pointers. You have to place an asterisk in front of the pointer to read the value the pointer points to.
Explanation:
So "if (str1 != str2)" must be "if (*str1 != *str2)".
likewise:
while (*str1 != 0 && *str2 != 0)
and
result = (*str1 == *str2);
Answer:
Alt + F9
Explanation:
The Keyboard shortcut that Stephen can use use to toggle between data and the field codes is Alt + F9. This is in regards to Microsoft Word Fields for both Windows and Mac operating systems. Although ALT + F9 will toggle between these two but for all the fields within the document. If you want to toggle between a single or various fields it would be Shift + F9.
Answer: static
Explanation:
variables when declared static gets called statically meaning whenever a function call is made it get stored and it is not required to get the variable again when the function is again called. There scope is beyond the function block
