Abstract
You may have noticed that when inflating the balloon the "breath power" has to be biggest for the first few "blow" when the balloon is still small, then later it goes better. Does it correspond with the preassure in the balloon?
You may have noticed that when inflating the balloon the "breath power" has to be biggest for the first few "blow" when the balloon is still small, then later it goes better. Does it correspond with the preassure in the balloon?