Mastering Vectors

A geometrical entity with neither magnitude nor direction.

A geometrical entity with magnitude and direction. (correct)

A geometrical entity with only magnitude.

A geometrical entity with only direction.

In the 18th century.

In the 17th century.

In the late 19th century. (correct)

In the early 19th century.

Physical quantities such as displacement, velocity, acceleration, etc. (correct)

Mathematical equations.

Geometrical shapes.

Chemical reactions.