Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Eight Minutes and a Half   In this paper we describe a simple conceptual problem, regarding the actual
position of the Sun at sunset or sunrise. Although this problem can be easily
explained in terms of rotating frames of references and standard Coriolis
Effect, it is sometimes misunderstood by students and even by some physics
textbooks. We also present a simple experimental activity which can be used as
a demonstration of this peculiar kinematical effect in general physics courses,
or become part of laboratory activities.

6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat