A Train Traveling Very Fast (V = 0

question 29

Multiple Choice

A train traveling very fast (v = 0.6c) has an engineer (E) at the front, a guard (G) at the rear and an observer (S') exactly half way between them.Both E and G are equipped with yellow signaling lamps.The train passes a station, closely observed by the station master (S) .Both E and G use their lamps to send signals.According to both S and S' these signals arrive simultaneously at the instant S' is passing S.According to S':

• A)E and G sent their signals simultaneously from different distances
• B)G sent his signal before E and from further away
• C)G sent his signal before E but was the same distance away
• D)E sent his signal before G and from further away
• E)none of the above

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Definitions:

Placebo Effect

The phenomenon where an individual experiences a perceived improvement in condition due to their expectations, not because the treatment has a therapeutic effect.

Symptoms

Observable signs or indications of the existence of a disease, condition, or the presence of an underlying psychological or physical disorder.

Exposure Therapy

A psychological treatment method that involves gradual exposure to feared stimuli in order to reduce the fear response over time.

Fear of Water

An intense and persistent anxiety about being in or around water, also known as aquaphobia.