Examlex
Fertilizer runoff from fields is an example of ____________________ pollution.
20,000 Hz
The frequency of soundwaves that typically represents the upper limit of human hearing.
Iris
The colored part of the eye that controls the size of the pupil and the amount of light that enters the eye.
Pitch
The perceived frequency of a sound, determining its "highness" or "lowness."
Amplitude
The height or strength of a wave signal, determining its intensity or power, often used in the context of sound, light, or electronic signals.
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