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Can you associate a vector with (a) the ...

Can you associate a vector with (a) the length of a wire bent into a loop (b) a plane area (c) a sphere.

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(a) We cannot associate a vector with the length of a wire bent into a loop. this is cause the length of the loop does not have a definite direction. (b) We can associate a vector with a plane area. Such a vector is called area vector and its direction is represented by a normal drawn outward to the area. (c) The area of a sphere does not point in any difinite direction. However, we can associate a null vector with the area of the sphere. We cannot associate a vector with the volume of a sphere.
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