Examlex
Find the vertex and directrix of the parabola.
Mannequin
A life-sized model of the human body, often used in retail to display clothes or in art for drawing reference.
Illusion
A perception that misleadingly represents reality.
Amplitude
In physics, the maximum extent of a vibration or oscillation, measured from the position of equilibrium.
Loudness
A subjective measure of the sound pressure level, perceived as the intensity or volume of a sound.
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