Examlex
suppose that a "word" is any string of seven letters of the alphabet, with repeated letters allowed.
-How many words begin with A or end with B?
Sound Wave
A type of pressure wave caused by the vibration of an object, which travels through a medium (e.g., air) and is perceived as sound.
Intensity
The degree of strength, force, or energy in a phenomenon or activity.
Convergence
The turning inward of the eyes, which occurs when they focus on a nearby object.
Eyes
Organs of vision that detect light and convert it into electro-chemical impulses in neurons.
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