Because it's not real and not made by the US Mint.
If it's a US coin it's a replica made in Asia.
That depends. If it is a regular dollar made for circulation it contains no silver and is worth face value. But if it's a collectors silver dollar in witch case it should say something like .999 silver then its worth its weight in silver, value changes with the silver market.
I would say it would only be worth face value; one Canadian dollar.
It depends, this silver dollar, which since you say has a "D" on it, which means it is a Morgan Dollar, is not worth much over its bullion value in this condition. As the price of silver has risen (about $35 per ounce as I write this), the silver value has now exceeded its numismatic value. Keep in mind that a silver dollar is NOT one ounce of silver. The coin is 90% silver and has 0.77343 of silver in them
"a dollar" would be un dollar
The U.S. did not issue silver dollars until 1794. You may have a fantasy piece or a copy of an early Continental piece, but without more information it's difficult to say. Prior to 1794 the U.S. adopted the Charles III Spanish silver dollar as legal tender. If you search through Google you will find Wikipedia information, including pictures, that will help you determine if this is what you have.
"Proof" means that the coin is in very good condition, and it could be worth $100-300, depending on who you sell it to. However, if it is a copy, you may as well toss it. The coin should say "copy" on it somewhere. If not, I would still check by looking up the weight of a real Morgan dollar and then weighing yours. Only a VERY good imitation can come close to the right weight.
Seeing as George Washington died in 1799, I'd say no, he didn't. The first US silver dollar was struck in 1794 so it is quite possible that he would have had at least one at some point. As for the story of Washington throwing a silver dollar across the Potomac river, it's not true and even if he did throw a "silver dollar" across the river, it would likely have been an 8 real coin of Spain or Mexico since there were no US silver dollars when Washington was a young man.
I would say a dollar...
since I'm not sure what you are asking , I'm gunna say yes
it should say it on the right
If you look on the back of the coin it will say 50 cents not a dollar. The coin is a Walking Liberty Half Dollar, circulated examples are valued for the silver content only at about $5.00 Uncirculated coins can be $25.00 or more.