It sounds like your yeast is not working. How old was it? Did you put it in cold water?
to make bread and mix bread
The smooth blade helps kneading before the bread is baked.
Yes
There are two methods:* by hand - kneading the bread with your knuckles then folding over and kneading over again. * by machine - put the bread into the machine and let it do its thing.
in bread making
Kneading
makes bread lighter
Yes you can but the result will be a rather flat loaf as pastry and cake flour do not contain as much gluten as bread flour. Gluten which is developed by kneading the bread dough is essential to a well structured bread.
Usually used for kneading pizza dough, tough cookie dough or kneading bread
Yes, some are. For example the Sunbeam 5891-33 and Hamilton Beach 29822c are interchangeable and likely many others.
Therapeutic as in Baking bread and kneading dough can be very therapeutic.
Kneeding bread is the process of folding a corner of bread dough into itself, turning a quarter turn, then folding again. The point is to stretch the gluten and to create a smooth surface. http://www.free-bread-recipes.com