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43 across s?a?a? having magnitude but not direction, I thought finished then saw I hadnt

Scalar?

scalar?

scalar

many thanks

Thanks from me, too, Marcus. New word to me. Mags.
(Can`t imagine ever using it!)

(It's a technical term from physics. It contrasts with "vector", which has both magnitude AND direction. For instance, "speed" is a scalar quantity, whereas "velocity" is a vector, as a direction must be specified.)