Here's why:

* A dime weighs 2.268 grams.

* 1000 dimes weigh 2.268 grams/dime * 1000 dimes = 2268 grams

* There are approximately 454 grams in a pound.

* 2268 grams / 454 grams/pound = 5 pounds

Therefore, 1000 dimes is about 5 pounds, not 1 pound. It's a bit heavier than you might think!