Unlike velocity, speed is scalar, which means it is described by only.

It can be described on by its magnitude

MAGNITUDE

Explanation:

Vector quantities are described by their magnitude and their direction both

so all vector quantities like velocity etc need direction and magnitude both like velocity is given as 60 km/h towards North direction

But for scalar quantities we defined them only by their magnitudes

Like here if we define mass then we do not require any direction for its complete explanation.

so here correct answer will be

MAGNITUDE

that is probably false!

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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