Does the home mixer work with a lid, stirring, or removing the lid and stirring?
The same, atmospheric pressure is the same, which means macro, if considered minor, cover the lid to be larger
Do you think boiling water is done by covering the lid or burning the lid quickly? Anyway, at least put the lid clean and safe!
It depends on the power, and the lid does not have much relationship
It's better to have it covered first. It's not safe to hold the lid if it doesn't cover it. The mixture doesn't fly yet. That's all!
Put on the lid. Not only to prevent food spilling out, but also because the space has been limited, the power of mixing will be greater, so that the food stir faster and better.
