A semi filled with chicken feathers overturned on northbound Interstate 5 in Federal Way, snarling the morning commute. The Washington State Department of Transportation said 40,000 pounds of ...

You fill your tires to 33 pounds per inch. The barometric pressure at my house right now is 30. A pound of butter weighs in at 16 ounces. So does a pound of feathers and a pound of concrete.