Surfaces of physical objects, or the surface of the Earth (wind).
Yes, ground friction is typically greater than air friction due to the surface contact and interacting molecules, which slows down objects more effectively compared to the sparse air molecules encountered in the atmosphere.
You can argue that when air passes through the body and holes it creates friction. Also, the whole mechanism when interacting with rods, screws and other keys can create friction.
A plane moving through air. Air is causing friction, A boat moving through water .Water causes friction.
Friction and air resistance.
Friction and air resistance.
Sound is a vibration travelling through the air. When it hits foam, it causes the foam to vibrate, which in turn causes friction. The friction causes heat.
No, heat does not lessen air friction. Air friction is mainly caused by the molecules in the air colliding with an object as it moves through the air. Increasing temperature can actually increase air friction because it causes air molecules to move faster and collide more frequently with the object.
The type of friction between air and another material is called "aerodynamic drag." This occurs when an object moves through the air and experiences resistance due to the air molecules interacting with its surface, slowing it down.
It's usually referred to as air resistance.
Air resistance causes friction and slows an object.
Friction among air molecules and other matter.
Friction is not useful when ever we do not want it. Examples would be when two materials are rubbing against one another. The friction of ropes in pulleys eventually causes wear on both; friction of shoes or straps against the body causes blisters; friction airplanes travelling through the air - friction causes the plane to get hot; the moving parts of an engine get hot from friction...