The U.S. Postal Service (USPS) generally separates shipping rates for different mail by weight. For example, the same stamp can send any letter - - as long as it weighs less than 3 ounces (85 grams). If your letter weighs more than that, you'll have to pay more to send it. If you want to send a package through the USPS Parcel Post, it can't weigh more than 70 pounds (32 kilograms) or be longer than 130 inches (330 centimeters) on its longest side.
How are maquettes used in 3-D animation?
Answered by Science Channel
Are you an optimist?
Answered by Hal Harvey
Why does it matter how the public perceives e-voting?
Answered by Discovery Channel