rearranging week 1

src/1_einstein_model.md

@@ -32,7 +32,7 @@ An empirical observation:
 
 ??? info "source"
 
-  By Nick B. - Own work, [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0 "Creative Commons Attribution-Share Alike 4.0"), [Link](https://commons.wikimedia.org/w/index.php?curid=54031939)
+    By Nick B. - Own work, [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0 "Creative Commons Attribution-Share Alike 4.0"), [Link](https://commons.wikimedia.org/w/index.php?curid=54031939)
 
 To explain assume that each atom is a classical harmonic oscillator in 3D.
 This gives 6 degrees of freedom, each contributing $k_B/2$ to the heat capacity.
@@ -54,6 +54,7 @@ ax.set_ylim((0, 3));
 ```
 
 So there is:
+
 * Strong temperature dependence of $C$
 * At high temperature the law of Dulong–Petit works
 * At low $T$, $C \rightarrow 0$