Which of These Astronomers Was the First to Detect the Rotation

question 49

Multiple Choice

Which of these astronomers was the first to detect the rotation of the Sun by watching sunspot motions?

• A) Halley, while watching his comet
• B) Copernicus
• C) Galileo
• D) Ptolemy

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Definitions:

Treasury-Bill Rate

The interest rate yield on U.S. government short-term debt securities known as treasury bills.

Reward-to-Variability Ratio

This ratio, often called the Sharpe ratio, measures the return of an investment relative to its risk, whereby a higher ratio indicates a more desirable outcome.

Risk-Free Asset

An investment perceived to have no risk of financial loss, often exemplified by government bonds.

Expected Return

The anticipated return on an investment based on the probabilities of various outcomes, factoring in both potential gains and losses.