A Student Is on Mars Standing on the Gangplank of a Spaceship

question 149

Multiple Choice

A student is on Mars standing on the gangplank of a spaceship when she sees an identical spaceship go past Mars at 90% of the speed of light. When she looks closely at this spaceship, how does it compare with her own spaceship?

• A) The moving spaceship appears to be shorter than hers, and time on it appears to move more slowly than on her ship.
• B) The moving spaceship appears to be shorter than hers, and time on it appears to move more quickly than on her ship.
• C) The moving spaceship appears to be longer than hers, and time on it appears to move more quickly than on her ship.
• D) The moving spaceship appears to be longer than hers, and time on it appears to move more slowly than on her ship.

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Definitions:

Babies

Young human offspring, particularly from birth until they can walk.

B Positive

A blood type in the ABO blood group system characterized by the presence of antigen B and the Rh factor on the surface of red blood cells.

Antigens

Antigens are substances, usually proteins or polysaccharides, that the immune system identifies as foreign or dangerous, triggering an immune response.

Rh Antigen

An antigen found on the surface of red blood cells, significant in determining blood type and incompatibility in transfusions.