Is 1 ounce of silver heavy?

The term "silver dollar" is used very loosely. It can refer to 3 types of coin:

> Modern bullion pieces sold for their silver content. These do weigh 1 oz. The "dollar" denomination is artificial and has nothing to do with their actual value.

> True dollar coins minted from silver, made intermittently from 1794 to 1935. These weigh about 9/10 of an ounce, depending on when they were minted.

> Modern dollar coins minted for circulation, even though these don't contain any silver. The term is used partly out of tradition and partly out of ignorance, because many people still believe circulating coins contain silver even though the mint switched to base-metal coinage 43 years ago.