The white fluffy stuff in the air is called "pollen."
yes
Its called "callus tissue" and is a natural part of the peach. It is not mold or fungus or anything harmful.
The white stuff inside an apple is called the apple core, which consists of the seeds and fibrous material. It is safe to eat, but the seeds contain a small amount of cyanide, so it is best to avoid eating them in large quantities.
The white stuff found in the middle of an apple is called the core.
The clear white stuff is called albumen and it protects the yolk of the egg. The opaque white stuff (two of them) that is close to the yolk and looks almost like jelly is called chalaza and it is a protein that holds the egg yolk in the center of the albumen. You only see chalaza in fresh eggs as it disappears in stale eggs.
White caps!
The white stuff is called pus
That's called semen.
There is no "white stuff" in a silencer/muffler, unless you mean fiberglass packing. It has no use when removed.
the plup
The white stuff inside your kettle is likely limescale, which is a mineral deposit that forms when water with high mineral content is heated. This is a common occurrence in kettles and can be removed by descaling the kettle regularly.