Question

which phrase describes speed? a. a quantity with direction only b. a quantity with no units c. a scalar quantity d. a vector quantity

Explanation:

Speed is a scalar quantity as it only has magnitude and no direction. Scalar quantities are described by a single - valued number with appropriate units. For example, a car's speed might be 60 miles per hour. It doesn't have an associated direction like a vector quantity does. Also, speed has units (such as m/s, km/h etc.) and is not a quantity with direction only.

Answer:

C. A scalar quantity