sadly it is backed only by promises. It used to be backed by gold but that was taken away and now it is backed by nothing.
No - the Australian dollar is a fiat currency.
The British Pound is backed by silver where as the US dollar isn't backed by anything as use to be in the 18th century.
Nothing, about a gram of paper. they represent a portion of debt.
No it's not, and hasn't been for decades.
No the Dinar is backed by gold repository
nothing
Regardless of denomination, silver certificates were a form of currency backed dollar-for-dollar with silver bullion on deposit in the US Treasury. Please see the Related Question for a more detailed explanation.
The U.S. dollar is not money but legal tender. Federal Reserve notes are "backed" by all the goods and services in the economy.
You must understand what fiat is first. This is money that is backed by nothing of any intrinsic value. Our currency for instance is no longer backed by gold, instead it is backed by government debt. When used in the political context of executive fiat, it describes a president using power that isn't backed up by law. Therefore on its face, it is as worthless as our currency is becoming
Nothing... THERE ISN'T MEXICAN DOLLAR!!! In Mexico the currency used is the MEXICAN PESO.
The United States currently has a "Fractional Monetary Reserve System" although the system was originally a "Specie-backed" system (each dollar backed by a quantified amount of gold, "The Gold Standard").