Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impedance of the free surface of liquid electrolytes   A possibility for the observation of so-called structure resonances (SR) in
electrolytes arising due to relative motion of the cluster charged nucleus and
its solvation shell is demonstrated. The discussed method considers the
resonant contribution of the SR to the frequency dependence of the reflection
(transmission) coefficient of the electromagnetic wave interacting with the
free electrolyte surface. Of special interest is the observation of SR for
multiply charged particles in electrolyte providing direct information on the
charge of single cluster. Also important are other not so prominent details of
the wave interaction with mobile charged clusters in electrolyte related to the
formation and complicated nature of the frequency dependence of the charged
cluster associated mass.

18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg