yes
All metals are electrically conductive.
It is glass which has a thin layer, virtually transparent, of electrically conductive material such as Tin Oxide deposited on the surface.
This mixture is not electrically conductive.
Invar can be used as magnetic core material, but there are better choices. Invar is alloyed for its thermal stability. It is iron with a good percentage of nickel. Remember that magnetic core material is usually laminated or is "powdered" in a way to electrically isolate the "bits" of core material so eddy currents will be reduced. A link is posted to the article on Invar put up by our friends at Wikipedia, where knowledge is free.
what footwear is electrically conductibe or non conductive
no
yes
Electrically conductive - yes
NO!
Safety shoes
It is electrically conductive.
No, most glues are not electrically conductive.
That depends on the substance of which the device is fabricated. If it's made of metal, then your metal straw is electrically conductive. If it's glass or paper, then it isn't.
No. Copper is the second most elkectircally conductive of all metals. Silver is the most conductive.
Copper or similar that can carry current
All metals are electrically conductive.