Grams and seconds.
scalar
No. It is a speed (a scalar) but not a velocity (a vector).
About 14.4 seconds. 0.1 miles / 25 miles per hour * 60 minutes per hour * 60 seconds per minute = 14.4 seconds
About 23.35 miles per hour.
Grams and seconds.
(55 miles per hour) is a scalar. (55 miles per hour heading north) is a vector.
No, mph (miles per hour) is a scalar quantity, not a vector quantity. Scalar quantities have magnitude only, while vector quantities have both magnitude and direction. In the case of mph, only the speed or magnitude is specified, not the direction.
scalar
No. It is a speed (a scalar) but not a velocity (a vector).
18.7 miles in 100 seconds = 673.2 miles per hour.
Traveling 60 miles per hour is a scalar quantity. Scalars only have magnitude and no direction, whereas vectors have both magnitude and direction. In this case, the speed of 60 miles per hour is the magnitude of the quantity without specifying a direction.
I would say only grams here as the other two choices seem to have indications of directionality which would make them vectors.
100 yards in 10 seconds 20.45 miles per hour.
About 14.4 seconds. 0.1 miles / 25 miles per hour * 60 minutes per hour * 60 seconds per minute = 14.4 seconds
About 23.35 miles per hour.
18/45 = 0.4 hour = 1,440 seconds