Yes
Knives, axes, scissors, and chisels. The forward edge of a crowbar is also a wedge.
Splitting things
I woud have to say that this refers to a wedge that was used to pound on in order to create a wedge between two things. From excessive pounding the wedge would be worn. Thus, over time, a mental beating - whether physical or intellectually - would make someone crazy.
The word wedge has many definitions. Since you are asking in the "Lawn and Garden Tools" section I will assume you are asking about a wedge that is used to separate two things as in chopping wood. Once a cut is made in the wood with an axe a wedge can be placed in that cut and hit with a large hammer to separate the two side of the wood.
There are many items in everyday life that involve a wedge. A spatula for cooking is a wedge, a door stopper is a wedge used to stop the door, and a knife use to chop vegetables is a wedge.
Yes
Axes, forks, nails, your teeth, knives and many more.
Knives, axes, scissors, and chisels. The forward edge of a crowbar is also a wedge.
water
A wedge Ex:axe ,sledge hammer, those types of things.
Wedge and segmental resections are still major surgery, but remove less tissue and may be the first choice for some patients, such as those with Stage I and Stage II non-small cell lung cancer.
Some wedges that are used in golf are the pitching wedge, the gap wedge, the sand wedge and the lob wedge. A used BNM Z4 can be found at a used car dealership or an online used car purchasing site. Some wedges that are used in golf are the pitching wedge, the gap wedge, the sand wedge and the lob wedge.
A zipper is not considered a pulley. It is considered a wedge because it has to wedge two things together, as wedge itself in to pry them apart.
Many different things can be used as a wedge. A nail or pushpin is a wedge, and so is a rubber doorstop. Wedges can be made of metal or of wood or plastics, and a wedge is a simple machine in this context.
Splitting things
No because a wedge cut things in half like cutting a wood in half