Maybe a penny cause it's least denser. But otherwise I don't know. Maybe a penny cause it's least denser. But otherwise I don't know.
Yes they will.
salt water, as the salt water eats away at the coin faster.
Modern coins cannot rust, as they are not made of iron.
Fresh water evaporate faster.
Fresh water is evaporated faster.
Fresh water is evaporated faster.
At the same temperature fresh water evaporates faster.
fresh water
Fresh water.
Fresh water.
fresh water
I suppose that the dissolution is faster in fresh water but the differences are minimal.