astroid
An asteroid or a meteoroid
[object Object]
depositing a metal to another
The process of coating an object with a metal is called electroplating. It involves using an electric current to deposit a thin layer of metal onto a conductive surface. This process is commonly used to enhance the appearance, corrosion resistance, and durability of the object.
The object you are describing is likely a meteorite. Meteorites are chunks of rock and metal that originate from asteroids or comets, which once orbited the sun. When these objects break apart or collide, fragments can enter Earth's atmosphere and survive the journey to the surface, becoming meteorites.
astroid
This is a decorative object of art; the English word is inlay.
a plate heat exchanger is a metal plate which is will be in contact with another item eg air or another metal object to move heat from one to another
A solid metal can absorb heat from another object through the process of conduction, where heat is transferred between objects that are in direct contact with each other.
holding a metal object and communicating with another, (perhaps at a significant distance) using only the mind to hold conversation.
An asteroid or a meteoroid
When you rub a magnet with metal, the metal object becomes temporarily magnetized. This happens because the atoms in the metal align with the magnetic field of the magnet. However, once the magnet is removed, the metal object loses its magnetism.
[object Object]
The electrons in the metal object are repelled by the negatively charged object and will move away from it. This redistribution of electrons can create a temporary separation of charges on the surface of the metal object.
In order to know what a metal object is on a dorm wall one would need more information. If a description of the metal object is given one may be able to determine what the object is.
You can use a magnet to test if something is metal. If the magnet sticks to the object, it is likely made of metal. Another way is to check for properties like conductivity or density, which can also indicate if something is metal.