Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational and electric energies in the collapse of a spherical
  thin-shell capacitor   We adopt a simplified model describing the collapse of a spherical thin-shell
capacitor to give an analytical description how gravitational energy is
converted to both kinetic and electric energies in the gravitational collapse.
It is shown that (i) averaged kinetic and electric energies are the same order,
about an half of gravitational energy of spherical thin-shell capacitor in the
collapse; (ii) caused by radiating and rebuilding electric energy, the
gravitational collapse undergoes a sequence of "on and off" hopping steps in
the microscopic Compton scale. Although the collapse process is still
continuous in terms of macroscopic scales, it is slowed down as the kinetic
energy is reduced and collapsing time is about an order of magnitude larger
than that of the collapse process eliminating electric processes.

35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics