The First Person We Are Aware of Who Determined the Circumference

question 47

Multiple Choice

The first person we are aware of who determined the circumference of the Earth using trigonometry and the angle of sunlight at Alexandria, Egypt, was:

• A)Pytheas.
• B)Eratosthenes.
• C)Herodotus.
• D)Seneca.
• E)Ptolemy.

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Definitions:

Organic Solvent

A carbon-based solvent that is capable of dissolving or dispersing one or more other substances.

Strong Acid

An acid that completely dissociates in solution, releasing a high concentration of hydrogen ions.

NaOH

Sodium Hydroxide, a strong base used in chemical manufacturing, paper making, and as a drain cleaner.

HCl

Hydrochloric acid, a diatomic molecule consisting of hydrogen and chlorine; a strong, corrosive acid commonly used in a variety of industrial and laboratory processes.