Katelyn Runs Along the Aisle of a Train That Moves

question 68

Multiple Choice

Katelyn runs along the aisle of a train that moves at 8 m/s. Her speed relative to the floor is 3 m/s. Her speed relative to an observer at rest on the ground is

• A)5 m/s.
• B)11 m/s.
• C)either depending on her running direction
• D)none of the above

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Definitions:

High-Frequency Sounds

Sounds that have a high pitch, typically those with a frequency of 2,000 Hz (Hertz) or higher, often beyond the range of human hearing as age increases.

Hearing Aid

A device designed to improve hearing by making sound audible to a person with hearing loss.

Adapt

The process of adjusting to new conditions or environments.

Dim Light

Low, insufficient lighting that makes vision difficult.