Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conical tip in frozen water drops   A theory is presented for the formation of a conical tip in water drops that
are frozen on a flat surface below freezing temperature. For the known ice to
water density ratio r = .917, the angle of aperture of this cone is found to be
{\theta} = 33.550, consistent with observations.

26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg