Which of the following could not be vector magnitudes
5 hours
12 miles
14 meters
60 kilometers/hour

5 hours

Explanation:

An hour is a unit of time which is a scalar quantity(It has no direction).

Miles and meters are units of displacement which is a vector quantity.

Kilometers/hour is a derived unit of velocity which is a vector quantity.

Among the following which is mentioned, 5 hours could not be vector magnitudes.

Answer : Option A

Explanation:

''Scalar'' and ''vector'' quantities are differentiated depending upon whether the object has magnitude and direction. Scalar quantities possess magnitude only whereas vector quantities possess both.

Time doesn't have any direction so it is not a vector quantity and so it comes under scalar quantity. Whereas ''distance'', ''displacement'', ''velocity'' has both magnitude and direction and hence they come under vector quantities. So option B,C,D are invalid in this context.

newton's first law of motion

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.