The First Intergalactic Spaceship Is Headed Toward the Magellanic Clouds

question 27

Multiple Choice

The first intergalactic spaceship is headed toward the Magellanic Clouds at a speed of 0.8c. The spaceship is 1 000 m long. Clocks at the front and the rear of the spaceship both read 3:00 P.M. Can it be 3:00 P.M. simultaneously at the front and the back of the spaceship?

• A) No, because , where Δx is the length of the spaceship.
• B) No, because one clock has to move after being synchronized with the other.
• C) Yes, because Δx in (a) is zero for different points of the same spaceship.
• D) Yes, because two clocks at rest relative to each other can be synchronized by means of light signals when the distance between them is known.
• E) The question cannot be answered unless we know the object relative to which the spaceship's velocity is 0.8c.

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Definitions:

Beta

A measure of the volatility, or systematic risk, of a security or portfolio compared to the market as a whole.

Factor Portfolio

A portfolio constructed to have a high sensitivity to certain risk factors, aiming to achieve specific investment outcomes related to those factors.

Well-diversified Portfolio

An investment portfolio spread across different assets to reduce exposure to risk associated with any single investment.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values, commonly used in finance to assess the volatility of an investment.