A 500-Hz Whistle Is Moved Toward a Listener at a Speed

question 17

Multiple Choice

A 500-Hz whistle is moved toward a listener at a speed of 10.0 m/s.At the same time,the listener moves at a speed of 20.0 m/s in a direction toward the whistle.What is the apparent frequency heard by the listener? (The speed of sound is 340 m/s. )

• A) 473 Hz
• B) 485 Hz
• C) 533 Hz
• D) 545 Hz

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Definitions:

Titin

A giant protein that functions as a molecular spring, contributing to the passive elasticity of muscle.

Muscle Fiber

An individual muscle cell, essential for producing force and movement through contraction.

Muscle Cell

A cell specialized for contraction, facilitating movement and support in the body, also known as a myocyte.

Sarcomere

The basic unit of a muscle's cross-striated myofibril and the site of muscle contraction.