If the Scalar (Dot) Product of Two Vectors Is Negative

question 71

Multiple Choice

If the scalar (dot) product of two vectors is negative, it means that

• A) there was a calculator error.
• B) the angle between the vectors is less than 90 degrees.
• C) the angle between the vectors is 90 degrees.
• D) the angle between the vectors is greater than 270 degrees.
• E) the angle between the vectors is between 90 and 180 degrees.

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Definitions:

Hydrobromic Acid

A strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water.

Strong Acid

An acid that completely dissociates into its ions in water, releasing all of its hydrogen atoms as hydrogen ions.

Acidity

A measure of the ability of a solution to donate hydrogen ions (H+) and thereby lower its pH.