Air flows from high pressure to low pressure, because the pressure difference acts as a force on the air molecules.
A more complicated answer involves the inherent motion of the air molecules due to heat, how compressing a volume can make them move even faster, and how air moves from one location to another because the faster molecules in one region spread into a slower region, and at the same time spread their energy as they collide with molecules at the boundary of the regions, in order to equalize a combination of thermodynamic properties involving the speed and mass of the molecules. This combination is called the 'pressure', so this answer is really the same as the first answer, but just a tad more thorough.
moving
The air fins on the motor must have air moving across them. So, the bike must be moving or have a fan in front of it.
get fan clutch checked may be blowing air but not enough
Cool air moving to take the place of warm rising air is also known as convection. This is how many heating and cooling systems work.
Every where when you are working with an object moving in air or other gas media.
Instead of saying "moving air," you could say air displation, or wind, if the air is in the act of moving.
Fans, engines, and turbines all require moving air to work effectively. Movement of air is essential for proper function and cooling in many devices and equipment, helping to dissipate heat generated during operation. Additionally, air is needed for combustion in systems such as furnaces and fireplaces.
Moving air can have more power than still air, as the kinetic energy generated by the movement of air molecules can create force. However, the power of moving air will depend on factors like velocity and volume of air movement. Still air can also have power in certain situations, such as in confined spaces where pressure differentials can lead to airflow.
Friction, air resistance, and gravitational force can all act to slow down a moving object. Friction occurs when two surfaces rub against each other, air resistance is the force exerted by air on a moving object, and gravitational force can work against the object's motion.
If the pump is running and not pumping after you reinstalled it, the pump may be air-bound. A small air pocket is in the pump preventing the impeller from moving water effectively. Pumps are very good at moving water but are very, very poor at moving air under pressure. You need to relieve the air from the volute.
Moving air probably has less molecules than still air because the particles are spread apart in moving air, and there is less of them, while in nonmoving air, it is packed.
An upward moving current of air is called an updraft.