The atmosphere pushes downward on the pool of Hg and forces some of it up into the tube. So the zonal component, which is -17.7 kts. Because its an easterly component. The meridional component, which is 17.7 kts. It is positive because it represents the southerly component.
Wind velocity is considered a vector, as it represents both the wind's magnitude and direction.
Wind speed has only a magnitude. Therefore, it is a scalar quantity. The parcel moves in a straight path, but the earth rotates beneath it, making it appear that the parcel deflects to the right. This happens for all motion regardless of direction. Doesn't vary along a latitude circle Scale Coriolis force is only important in larger scale systems that have a longer life span like hurricanes.