IOAA 2011, theory — Задача 6

*Short theoretical questions

Each question max 10 points*

Условие

6. Tidal forces result in a torque on the Earth. Assuming that, during the last several hundred million years, both this torque and the length of the sidereal year were constant and had values of 6.0 × 10$^{16}$ N m and 3.15 × 10$^{7}$ s respectively, calculate how many days there were in a year 6.0 × 10$^{8}$ years ago. Moment of inertia of a homogeneous filled sphere of radius $R$ and mass $m$ is

$I = \frac{2}{5}mR^2$

Решение

Оригинал в Архива: 2011_Short_Questions.pdf