Platters made from several material ferromagnetic and nonmagnetic material which are:
1 : perpendicular material cobalt and platinum and Cr
2: coated material Al2O3
Weight of platinum about 10 % to 35 %
The most common material used for hard drive platters is a type of metal called aluminum.
Hard disk platters are commonly made of a magnetic material called cobalt alloy or aluminum alloy.
iron rush
You can buy new or used silver platters from Silver Platters. Most department stores sells silver platters, The Bay, Sears, or even flea market, they do have vintage silver platters.
cloth wool and ect
They took ash from Mount Vesuvius and mixed it with wet lime to make a kind of concrete that was also used for constructing the Colosseum in Rome, Italy. The way the Colosseum is still holding up is because they used this kind of material to make this concrete.
The rich people used silk, and the poor/middle class used cotton or something
The positive electrode is a graphite rod (elemental carbon).
A copper wire can be used to make an electromagnet by wrapping it around a magnetic core material such as iron. When an electric current flows through the wire, it creates a magnetic field around the wire, which magnetizes the core material.
.............................
Velour material is material used to make tracksuits etc.
Banter