Final answer:
The pressure gradient force is strongest where isobars are closely spaced. This force is illustrated by everyday examples such as shower curtains moving inward due to pressure differences created by the flow of water and air. Boyle's law also explains the relationship between gas volume and pressure, contributing to the movement of air from higher to lower pressure areas. The correct answer is option C).
Step-by-step explanation:
The pressure gradient force is a crucial concept in meteorology that arises when there is a change in air pressure over a distance. It is responsible for accelerating air from regions of higher air pressure to regions of lower air pressure. The strength of the pressure gradient force depends on how close together the isobars are on a weather map. Closely spaced isobars indicate a steep pressure gradient and a strong pressure gradient force.
The phenomena of air pressure differences and their effects can be seen in various situations such as when shower curtains bulge inwards during a shower due to high-velocity streams of air creating lower pressure areas, or when cars and trucks on a highway experience an apparent pull towards each other as they pass closely, due to the lower pressure created by the rapid movement of air between them.
Furthermore, Boyle's law describes the relationship between the volume of a gas and its pressure, stating that a gas will have lower pressure in a larger volume, and higher pressure in a smaller volume. This principle aids in understanding how air moves following the pressure gradient force, from areas of higher pressure to areas of lower pressure.