It depends on the batter.
If using Eggs and sugar and then whipping it "stiff" first, then you should not beat it much at all after adding the rest of the ingredients as that takes the airbubbles away from the dough.
If you use a raisingagent like bakingsoda in the batter then id doesnt matter as much with a lot of beating.
regards.
you put about 1/2 of cake batter
Depends on the cake ingredients! Follow the recipe, if you do not have one, I recommend beating until it is creamy and everything is incorporated into the batter with nor lumps.
yes, cake batter can be beaten with a whisk, spoon, fork or spatula, or any other convenient utensil.
If you are using a 2" deep cake pan you would need 13.5 cups of batter.
As much as you want except if your pregnant
10 Pieces .
1/2 full
6 cups for one layer
It depends on how deep the cake pan is.
5 because the cake swells when it bakes so 5 is enough
Cake Batter Is Changed Into A Physical Change
It depends on how much of a blueberry flavor you want. For the average amount of cake batter, add about 1 to 1.5 teaspoons of extract.