Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective Molecular Dynamics of a Floating Water Bridge   When a high voltage is applied to pure water filling two beakers kept close
to each other, a connection forms spontaneously, giving the impression of a
floating water bridge. This phenomenon is of special interest, since it
comprises a number of phenomena currently tackled in modern water science. The
formation and the main properties of this floating water bridge are analyzed in
the conceptual framework of quantum electrodynamics. The necessary conditions
for the formation are investigated as well as the time evolution of the
dynamics. The predictions are found in agreement with the observations.

9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex