USAAAO 2018, I кръг — Задача 14
USAAAO National Astronomy Olympiad First Round 02/12/2018-02/16/2018 Time Limit: 75 Minutes · 12 февруари 2018 г. · 1 т.
Внимание: Бележка към темата
The solutions document provides answer letters for all 30 problems and brief explanations for some problems.
Условие
What property of the interiors of stars changes at the Kraft break, around 1.6 Solar masses?
A. The dominant spin state flips
B. The dominant energy transport mechanism in the interior changes
C. The flaring activity increases
D. The core becomes iron-rich
E. Hydrogen burning ends in the core
Решение
Answer: B
Оригинал в Архива: usaaao-first-round-exam-2018.pdf · официални решения: usaaao_first_round_2018.pdf