Let $\vec { n }$ Be the Unit Normal Vector of S

question 47

True/False

Let $\vec { n }$ be the unit normal vector of S.If the angle between $\vec{F}$ and $\vec { n }$ is less than $\pi$ /2 at each point of the surface, then $\int _ { S } \vec { F } \cdot \overrightarrow { d A } \geq 0$

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Definitions:

Psoriasis

A chronic autoimmune skin disease that speeds up the growth cycle of skin cells, causing red, scaly patches.

Macule

A flat, distinct, colored area of the skin less than 1 centimeter wide that does not involve any change in the thickness or texture of the skin.

Anhidrosis

The inability to sweat normally, which can lead to overheating.

Evaporation

The process by which water changes from a liquid to a gas or vapor, often contributing to the water cycle.