Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sound Absorption and Dispersion in Dilute Polyatomic Gases: A
  Generalized Kinetic Approach   A generalized kinetic model equation which takes into account the frequency
depence of the thermal conductivity is used to analyze the problem of sound
propagation in dilute polyatomic gases. By comparing the theoretical results
with some available experimental data we infer that our model equation provides
a precise transition between low and high-frequency limits.

7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an