Nothing
2.065 pounds per cubic yard
About 2 pounds
The mass of the air would be 984g at 25C (temperature also has an effect).
The density of dry air is 1.29 grams per liter (.07967 pounds per cubic foot) at 32° Fahrenheit (0° Celsius), average sea level, and average barometric pressure (29.92 in of mercury [760 millimeters]). The weight of 1 cubic foot of dry air at 1 atmosphere of barometric pressure is:Temperature (Fahrenheit)Weight per cubic foot (pounds)50° 0.0778860°0.0764070°0.07495
The mass of the air would be 984g at 25C (temperature also has an effect).
This depends on what substance and at what temperature at sea level. Cubic feet is a volume. Kilogram is a weight. Give me a substance and I'll tell you how.
Specific weight is the weight of the material per unit volume. Water has the specific weight of 62.43 pounds per cubic foot or 9.807 Newtons per cubic meter.
there are 27 cubic feet in a cubic yard hence 420 divide by 27 equals 15.55555
If you take the average weight of all of the molecules in one cubic foot of air and add them together you reach 0.0807 pounds. This number can fluctuate with temperature and variations in the composition in the air.
The weight of unfilled polycarbonate is 0.0433297 pounds per cubic inch
14.7 pounds per square inch at sea level.
We have a little definition trouble with your answer. The weight of air or any other thing has to be per a known amount. So your personal weight would be stated as the weight of a person. Weight of air is usually calculated per cubic yard, Meter, A Gallon etc. With out that a pound (or Kilo) of air weighs a Pound ( or Kilo ) hot or cold. Air gets lighter or less dense as it warmed up, but it needs to be stated as a (Given size) weighs (Whatever) (at a given temperature) (at sea level usually)