Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Application of FCI at engineering students in Bogota: an interpretation
  of the answers through a random model of two levels   We applied the FCI to 646 engineering students from Bogota when they began
your first year physics, we found that the relative frequency of the number of
correct answers has a random pattern of two levels, also we found that they
don't have clear mental models about physical world.

31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph