Each of Two Vectors, and , Lies Along

question 26

Multiple Choice

Each of two vectors, and , lies along a coordinate axis in the xy plane. Each vector has its tail at the origin, and the dot product of the two vectors is . Which possibility is correct?

• A) and both lie along the positive x axis.
• B) lies along the positive x axis. lies along the negative x axis.
• C) and both lie along the positive y axis.
• D) lies along the negative x axis. lies along the negative y axis.
• E) lies along the positive y axis. lies along the negative x axis.

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Definitions:

K Complexes

A type of brainwave that appears during Stage 2 of sleep, signifying periods of brain silence or reduced neural activity.

Sleep Spindles

These are brief bursts of brain activity characterized by their waxing and waning appearance on an EEG, typically occurring during stage 2 of sleep.

Stage 2 Sleep

A period of light sleep before entering deeper sleep, characterized by specific patterns such as sleep spindles and K-complexes.

REM Sleep Lack

A deficiency in Rapid Eye Movement sleep, a stage of sleep characterized by vivid dreaming, which can result in impaired focus and memory.