Sonar Is Used to Determine the Speed of an Object

question 67

Multiple Choice

Sonar is used to determine the speed of an object.A 40.0-kHz signal is sent out,and a 42.0-kHz signal is returned.If the speed of sound is 345 m/s,how fast is the object moving?

• A)6.9 m/s
• B)8.4 m/s
• C)331 m/s
• D)347 m/s

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Definitions:

Motion Parallax

A depth cue in which objects closer to the observer move faster across the visual field than objects farther away, providing a sense of depth.

Convergence

The process or state of converging, especially in the context of ideas, technologies, or forces coming together.

Interposition

A visual cue in which one object partially covers another, creating a perception of depth.

Retinal Disparity

The slight difference in the visual images that the two eyes perceive because of their different angles, enabling binocular vision.