Instructions: On occasion, the notation will be a shorthand notation for .

Which statement is true about the unit vectors and ?

A.

Their directions are defined by a left-handed coordinate system.

B.
The angle between any two is 90 degrees.

C.
Each has a length of 1 m.

D.
If  is directed east and  is directed south,  points up out of the surface.

E.
All of the above.


Answer: B

Physics & Space Science

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