Why Is the Term  "Arc" Used to Describe Units of Measure

question 3

Multiple Choice

Why is the term  "arc" used to describe units of measure for angular distance?

• A) To avoid confusion with the minutes and seconds of time
• B) To describe the arc-shaped distance between the stars
• C) To distinguish the base unit of 10 per degree
• D) To distinguish the difference between northern and southern spheres
• E) To describe the placement of the stars within each hemisphere

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Definitions:

Tertiary Alcohols

Alcohols in which the hydroxyl group (-OH) is bonded to a carbon atom that is itself bonded to three other carbon atoms.

Acid Chlorides

A class of organic compounds derived from acids by replacing a hydroxyl group with a chloride atom, known for their reactivity in forming other derivatives.

Propanoic Anhydride

An organic compound derived from propanoic acid, used in organic syntheses.

Phenol

An aromatic compound featuring a hydroxyl group (-OH) attached to a benzene ring, widely used in chemical manufacturing.