By the person, patterns and legends engraved on it, the dimensions of the coin and what it appears to made from.
It depends on year and denomination.
All U.S. coinage displays its denomination (face value) on it, usually on the back.
It would depend on the year, denomination and type of coin.
The national motto E-PLURIBUS-UNUM does not identify the coin. Post new question with the denomination.
There is not enough information to identify this coin. Please examine it, determine its denomination and then submit a new question .
It depends on the year, condition and denomination of the coin. It could be as little as a few cents(for a common low denomination coin in circulated condition), or as much US$600 (for a large gold commemorative coin).
E Pluribus Unum does NOT identify a coin. Post a new question and include the country of origin, denomination, and date.
You need to better identify the coin:Country of origin (note that if the coin was issued by Great Britain, the country will not be expressed on the coin), denomination, year (obviously sometime between 1953 and 2009) and condition (e.g., well worn, brand new, or something in between).
Need to know the denomination and year - and condition.
It could mean anything depending on the coin. What country? What year? What denomination? What does the coin appear to be made from?
There are only two sides... one will have a date and a denomination. That's all you need.
I think you would have to be a physicist to do that. It would be easier to identify the coin by nation of origin, date and denomination, and a coin guide book will help do this, and the book will tell you what metal the coin is made from.