In the confined space of the small tunnel made by your lips, all of the air is moving rapidly. But when it exits your lips it runs into stationary air and pushes it out of the way. But then this air runs into even more stationary air and pushes it away. Which runs into even more stationary air...etc etc etc. On top of this, the air that's pushed out of the way is replaced by slow moving air coming in from behind, which itself then has to be pushed out of the way by your breath. The end result is that your breath only has a small distance in which it retains any significant velocity.jhan said:
I throw in the towel when it comes to anything beyond basic calculus, of which fluid mechanics definitely is beyond.jhan said:
The physics of a towel thrown through the air as it gradually opens up must be quite complicated, I imagine.Drakkith said:
The act of blowing a puff of air involves the movement of air molecules from an area of high pressure to an area of low pressure. When we blow, we increase the pressure in our lungs, forcing the air out through our mouth or nose. This creates a stream of moving air molecules that can be felt as a puff of air.
When we blow on hot food or drinks, we are essentially increasing the rate of heat transfer from the hot object to the surrounding air. This is because the moving air molecules carry away some of the heat energy from the hot object, causing it to cool down faster.
The strength of a puff of air is affected by several factors, including the force and speed at which we blow, the size and shape of our mouth, and the density and temperature of the surrounding air. These factors determine the amount of air molecules that are moved and the force with which they are moved.
Yes, blowing a puff of air can cause changes in air pressure. When we blow, we are essentially creating a temporary increase in air pressure in our mouth, which then decreases as the air moves out. This can be demonstrated by blowing up a balloon or blowing out a candle.
The physics of blowing a puff of air is related to several other scientific concepts, such as fluid dynamics, thermodynamics, and aerodynamics. It also involves the principles of force, pressure, and energy transfer. Understanding the physics behind blowing a puff of air can help us better understand these related concepts and their applications in various fields.
