update implementation notes, phetsims/gravity-force-lab-basics#134

phetsims · Jun 5, 2019 · edf0c80 · edf0c80
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 This sim is the translation from existing java simulation. Initial development on the simulation is done by MLL.
 
-In the further development of this Sim feature of constant radius is added and color of the mass is changed to show how
-density will vary and fow low mass it looks almost airy.
+In the further development of this sim feature of constant radius is added and color of the mass is changed to show how
+density will vary and for low mass it looks almost airy.
 
-The mass out here varies from 1 KG to 1000KG and model deals with all the distances in meter. The center in the model
-co-ordiantes is between the masses
+The mass varies from 1 KG to 1000KG and model deals with all the distances in meter. The center in the model
+coordinates is between the masses.
+
+
+## Disposal
+
+There are no dynamic pieces to this simulation, and as a result nothing is disposed.
+As a result no listeners need to be unlinked or removed.