air pressure is _____.
Agravity's pull on air molecules
Bhigher the farther you are from earth's surface
Cabout 5 lbs per square inch at sea level
Ddifficult to measure
Agravity's pull on air molecules
Bhigher the farther you are from earth's surface
Cabout 5 lbs per square inch at sea level
Ddifficult to measure