MAINT: Adding BC information and Project C details.

Author: qalshidi

day_10/readme.md

@@ -10,6 +10,9 @@ $$
 \frac{\partial^2 T_i}{\partial z^2} = - \frac{Q_{EUV,i}}{4 \cdot 10^{-4}}
 $$
 
+The boundary conditions should be $\partial T / \partial z = 0$ at the top and
+$T=200$ K in the bottom.
+
 ## Project B
 
 Using RK4 solve the below question for 24 hours:
@@ -26,7 +29,9 @@ what is seen.
 Solve the chemistry equation using an implicit method
 
 $$
-\frac{\partial N_i}{\partial t} = Q_{EUV,i} - R \times M \times N_i
+\frac{\partial N_i}{\partial t} + \frac{V \cdot N_i}{z} = Q_{EUV,i} - R \times M \times N_i
 $$
 
-Make an animation of the results and explain what is happening.
+Where N is the number density, V=-10m/s, R is the reaction rate, M is the
+density of species it is reacting with. Make an animation of the results and 
+explain what is happening.