Assuming you mean Lincoln cents, the 1909-S V.D.B., 1914-D, 1931-S and the 1955 Double-Die are the icons of the series.
The US never made silver pennies. In 1943 the US made steel pennies. These are often mistaken for silver pennies.
Cents have been struck for almost 220 years and there are many dates that are quite valuable. Take a look at the lists on a site such as http://www.numismedia.com/fmv/fmv.shtml for lots of information.
Yes. U.S. dimes, quarters, and half dollars dated 1964 or earlier contain 90% silver, and pennies before 1982 are 95% copper.
Yes
No such thing. Wheatback pennies started in 1909, also known as Lincoln pennies.
it depends wheather or not you are interested in them and think they are valuable.
If the pennies were pre-1982 then 9 US pennies are very close to 1 ounce (9.145 pennies = 1 ounce). If the pennies are after 1982 then 11 US pennies are very close to one ounce (11.34 pennies = 1 ounce).
56,400 pennies
The US never made silver pennies. In 1943 the US made steel pennies. These are often mistaken for silver pennies.
Two pennIes
For US money-21500 pennies would equal $215. There are 100 pennies to a dollar.
The diameter of a US penny is 0.75inches. There are 256 pennies in a square foot
$750.00 = 75,000 pennies (cents in the US).
35,000 pennies is equivalent to 350 US Dollars. ($1=100 pennies)
There are fifty coins in a roll of US one cent coins, casually called pennies.
This is difficult to answer because the exchange rate is constantly floating. However, because the British Pound system uses "pennies", NOT "cents", it would have to be PRETTY VALUABLE.
Copper