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Gizachew Tiruneh

Publications and source records attributed to Gizachew Tiruneh.

2 recordsLinked to original sources

Explaining Planetary-Rotation Periods Using an Inductive Method

This paper uses an inductive method to investigate the factors responsible for variations in planetary-rotation periods. I began by showing the presence of a correlation between the masses of planets and their rotation periods. Then I tested the impact of planetary radius, acceleration, velocity, and torque on rotation periods. I found that velocity, acceleration, and radius are the most important factors in explaining rotation periods. The effect of mass may be rather on influencing the size of the radii of planets. That is, the larger the mass of a planet, the larger its radius. Moreover, mass does also influence the strength of the rotational force, torque, which may have played a major role in setting the initial constant speeds of planetary rotation.

astro-ph.SR↗

Age and Winning Professional Golf Tournaments

Most professional golfers and analysts think that winning on the PGA Tour peaks when golfers are in their thirties. Rather than relying on educated guesses, we can actually use available statistical data to determine the actual ages at which golfers peak their golf game. We can also test the hypothesis that age affects winning professional golf tournaments. Using data available from the Golf Channel, the PGA Tour, and LPGA Tour, I calculated and provided the mean, the median, and the mode ages at which professional golfers on the PGA, European PGA, Champions, and LPGA Tours had won over a five-year period. More specifically, the ages at which golfers on the PGA, European PGA, Champions Tour, and LPGA Tours peak their wins are 35, 30, 52, and 25, respectively. The regression analyses I conducted seem to support my hypothesis that age affects winning professional golf tournaments.

stat.AP↗