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The make-up of some U.S. coins
| Coin |
Penny |
Nickel |
Dime |
Quarter |
Half Dollar |
SBA Dollar |
Golden Dollar |
| Obverse Design |
Abraham Lincoln |
Thomas Jefferson |
Franklin Roosevelt |
George Washington |
John F. Kennedy |
Susan B. Anthony |
Sacagawea |
| Reverse Design |
Lincoln Memorial |
Monticello |
Torch, Olive Branch, Oak Branch |
Eagle or State-Specific Designs |
Presidential Coat of Arms |
Apollo 11 Insignia, Eagle |
Eagle |
| Metal Composition |
Copper-Plated Zinc (97.5% zinc, 2.5% copper) |
Copper-Nickel Alloy (75% copper, 25% nickel) |
Copper-Nickel Clad* (91.67% copper, 8.33% nickel) |
Copper-Nickel Clad* (91.67% copper, 8.33% nickel) |
Copper-Nickel Clad* (91.67% copper, 8.33% nickel) |
Copper-Nickel Clad* (87.5% copper, 12.5% nickel) |
Manganese Brass Clad** (88.5% copper, 6.0% zinc, 3.5% manganese, 2.0% nickel) |
Weight
(grams) |
2.5 |
5.0 |
2.268 |
5.67 |
11.34 |
8.1 |
8.1 |
Diameter
(millimeters) |
19.5 |
21.21 |
17.91 |
24.26 |
30.61 |
26.5 |
26.5 |
Thickness
(millimeters) |
1.55 |
1.95 |
1.35 |
1.75 |
2.15 |
2.0 |
2.0 |
Edge Texture
(Number of Ridges) |
Smooth |
Smooth |
Ridged (118) |
Ridged (119) |
Ridged (150) |
Ridged (133) |
Smooth |
*A pure copper core sandwiched between two layers of a 75 percent copper and 25 percent nickel alloy.
**A pure copper core sandwiched between two layers of manganese brass, which consists of 75 percent copper, 12 percent zinc, 7 percent manganese, and 4 percent nickel.
Science News, April 1, 2000; Vol. 157, No. 14,
"The Buck Starts Here", pg. 216.
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How many ways are there to make change for a dollar?
Created: 21 Apr 2000 14:11:14 -0700
Changed: 19 Jun 2006 05:55:20 -0800
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