What are the uses of hard bristled tooth brushes?
Pretty much just cleaing the hard to reach spots in the bathroom. Hard bristles are too much for the gum tissue to handle. Gums are very senistive and teeth don't need to be scrubbed with steel wool, just a soft tooth brush will do the job.
When a tooth is pulled it's gone. When you have a root canal the root of the tooth has become infected, the dentist uses a conventional cavity drill to get down to the nerves then uses a very small, flexible drill-like wire to drill down through the nerve of the tooth. Actually, the dentist goes down through each of the nerves since there are usually a couple nerves in a tooth. After the nerves are…
At the tip of it's beak is a hard point called an 'egg tooth'. When it starts to hatch, it uses this egg tooth to poke through the shell and then it gradually makes it way out. It needs to use every muscle in it's body to get out; no one should help it while it's hatching even if it looks like it won't make it out by itself.
A painter uses brushes and paint, usually oil paint, but there are other kinds too. They put the paint, maybe mix it, on a kind of handheld board, a palette. With brushes of various sizes they apply the paint on a canvas or a wood panel (or board), which standson a contraption called an easel. Is that what you want to know?
Hard drives have many uses in a computer. The main functionality of a hard drive though is data and program storage. The hard drive is where your operating system is stored and called upon. Additionally, your hard drive is where all of your other programs and your media like pictures, videos and more are stored.