Hi, I'm doing a 4000 word essay on any topic extending past what is covered in the high school curriculum. The approach is recommended to be experimental in nature but I don't know which topic would be best suited for me to be able to write that amount. The question has to be focused which is where I'm having trouble. Here is an example of what is expected: http://viksu.aka.fi/Tiedostot/Tiedostot/Viksu/Gvidas%20Kiseliovas%20ty%C3%B6.pdf [Broken] Some other topics are: How does the cross-sectional area and angle of a cardboard cone affect its terminal velocity? The Relationship Between Specific Heat Capacity and Thermal Conductivity of a Liquid I'm thinking of doing something with air hockey, rotational dynamics or something with thermodynamics, but I don't know where to go from here. Any feedback would be appreciated, thanks.