No, some metals (Aluminum and Gold, etc.) are non-magnetic.
There are many different examples of what could be considered tough materials. These materials include rubbers, metals, and plastics for example.
"see if a magnet sticks to it, if it does it is metallic" Wrong..... Not all metals are metallic. You could run an electric current through it to test for metals.
Magnetic powder, iron powder, etc.Iron Filings.
You could use a magnet to separate a collection of metal objects from a tomb. Iron object and other ferrous metals will stick to the magnet while some other types of metals will not.
Magnetic powder, iron powder, etc.Iron Filings.
"With a magnet; if it attracts then it is a metal, if it dosent then its not a metal." WRONG! Only some metals are magnetic. Whoever wrote this is ...... To test for a metal you could: Pass a electric current through it. Im sure there are more methods but this is the easiest.
Magnets have magnetic force in them, obviously, to attract or repel magnetic materials. The materials could not be attracted without the magnetic force because the magnet forces the magnetic material towards it.
Yes, we can see the use of iron oxide (the Fe2O3 kind, which is iron (III) oxide) used in magnets. There are a number of different things that could be used in a magnet, but simply using this material, often referred to as ferrite, and a little bit of some other materials to make up the ferrite, will allow for the construction of a magnet.
Minerals, precious metals and jewels, foodstuffs, timber, materials, manufactures, anything for which they could meet a demand or make a demand for.
Old computers *should* be recycled. Computers contain many hazardous materials, including mercury and lead, as well as many recyclable metals, such as gold and copper. Motherboards in computers get crushed down to a powder, then heated up to different temperatures to melt off the plastic first, then higher temperatures to melt out the different metals.
The magnet by itself would not kill you. However... If the magnet was sharp or pointy it could cut or perforate your digestive tract, which could kill you. If the magnet was too large to pass through your digestive tract it could cause a fatal obsruction. If the magnet was coated with a toxic substance, that substance could kill you.
They are could consist of different materials, like clay, sand, or rocks.