Fix review issue

Author: MaximSmolskiy

Diff for: physics/speeds_of_gas_molecules.py

@@ -5,6 +5,8 @@
 speeds of particles in an ideal gas.
 
 The distribution is given by the following equation:
+    f(v) = (M/2πRT)^(3/2) * 4πv^2 * e^(-Mv^2/2RT)
+
     .. math:: f(v) = \left(\frac{M}{2 \pi RT}\right)^{\frac{3}{2}} \cdot 4 \pi v^2
                      \cdot e^{-\frac{Mv^2}{2RT}}
 
@@ -20,19 +22,25 @@
 The average speed can be calculated by integrating the Maxwell-Boltzmann distribution
 from 0 to infinity and dividing by the total number of molecules. The result is:
 
+    v_avg = √(8RT/πM)
+
     .. math:: v_{avg} = \sqrt{\frac{8RT}{\pi M}}
 
 The most probable speed is the speed at which the Maxwell-Boltzmann distribution
 is at its maximum. This can be found by differentiating the Maxwell-Boltzmann
 distribution with respect to :math:`v` and setting the result equal to zero.
 The result is:
 
+    v_mp = √(2RT/M)
+
     .. math:: v_{mp} = \sqrt{\frac{2RT}{M}}
 
 The root-mean-square speed is another measure of the average speed
 of the molecules in a gas. It is calculated by taking the square root
 of the average of the squares of the speeds of the molecules. The result is:
 
+    v_rms = √(3RT/M)
+
     .. math:: v_{rms} = \sqrt{\frac{3RT}{M}}
 
 Here we have defined functions to calculate the average and