Which of the following is not necessarily true?

A)The product of two scalars is a scalar.
B)The product of two vectors is a vector.
C)The sum of two vectors is a vector.
D)The difference of two scalars is a scalar.
E)The sum two scalars is a scalar.

Question

Which of the following is not necessarily true?
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A)The product of two scalars is a scalar.
B)The product of two vectors is a vector.
C)The sum of two vectors is a vector.
D)The difference of two scalars is a scalar.
E)The sum two scalars is a scalar.

Quizplus · Accepted Answer

The product of two vectors does not always result in a vector; it can result in a scalar (dot product) or a vector (cross product), depending on the operation used.

Which of the Following Is Not Necessarily True