A scalar is a magnitude that doesn't specify a direction. A vector is a magnitude where the direction is important and is specified.
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The product of a vector and a scalar is a new vector whose magnitude is the product of the magnitude of the original vector and the scalar, and whose direction remains the same as the original vector if the scalar is positive or in the opposite direction if the scalar is negative.
Hours is a scalar quantity, as it only represents the magnitude of time elapsed and does not have a direction associated with it.
Scalar quantities are physical quantities that have only magnitude and no direction. Examples include mass, temperature, speed, and volume. These quantities are described fully by their magnitude alone.