Can wind/air that is moving at average speeds be slowed down by the cause of Friction? Also, Can Air bubbles in water be slowed down because of Friction? Please cite your sources.
Yes, air and gas are slowed down by friction since they have a non-zero viscosity. From wikipedia:
Viscosity can be conceptualized as quantifying the internal frictional force that arises between adjacent layers of fluid that are in relative motion.
Yes, air bubbles in water are slowed down by friction since water has a non-zero viscosity. Check out this youtube experiment showing bubble rise rates between fluids with various viscosities.