On a Day When the Speed of Sound in Air

question 51

Multiple Choice

On a day when the speed of sound in air is 340 m/s, what will be the wavelength of sound of frequency 227 Hz?

• A) 227 m
• B) 3.0 m
• C) 1.5 m
• D) 0.67 m
• E) 0.33 m

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Definitions:

Motor Unit

A single motor neuron and all the muscle fibers it innervates, functioning together to produce movement.

EMG Experiment

A diagnostic procedure involving recording and analyzing electrical activity produced by skeletal muscles.

Tonus

The state of partial contraction or tension in a resting muscle, giving it firmness and elasticity.

Hand Dynamometer

A device used to measure hand grip strength, often used in physical therapy and assessments of muscular function.