plastic, steel, zinc, and carbon
A metal boat would float on water and be a conductor of electricity.
it can be demonstrated by electrolysis with copper anode and graphite Cu-2e=Cu_2+
Yes, wood is not a good conductor of electricity. Therefore, a wooden spoon will not conduct electricity like metal spoons would.
A metal key would conduct electricity.
If it is made of metal, it is a conductor.
It depends on the liquid. Oil would not be a good conductor of electricity. Water is a good conductor, though distilled water is not. Any liquid metal or ionic compound would be a good conductor.
A knife is typically made of metal, which is a conductor of electricity. Therefore, a knife would conduct electricity if it came into contact with a live electrical source.
it would be a conductor, as most metal conducts electricity.
Brass is a metal and is a good conductor of electricity. Therefore, brass paper fasteners would conduct electricity rather than insulate it.
A key is typically not a conductor of electricity on its own. However, if the key is made of a metal such as copper or aluminum, which are good conductors of electricity, then it can conduct electricity. The key would need to be part of a circuit for it to conduct electricity.
Plastic is generally used as an insulator. A plastic ruler would not be a conductor of electricity.
insulator