2.065 pounds per cubic yard
Nothing
The weight of air at sea level is approximately 0.075 pounds per cubic foot. One cubic yard is equal to 27 cubic feet, so the weight of air per cubic yard at sea level would be approximately 2.025 pounds.
About 2 pounds
The mass of the air would be 984g at 25C (temperature also has an effect).
The weight that 1 cubic foot of air can support depends on the density of the air. At sea level and room temperature, 1 cubic foot of air can support approximately 0.08 pounds. However, this value can vary based on factors such as altitude and temperature.
The weight of air is about 1.2 kg/m^3 at sea level. That means for each cubic meter of air, it weighs approximately 1.2 kilograms.
At sea level and 15 deg C, the weight of a cubic metre of air is approx 11.0 Newtons.
One cubic foot of air can float approximately 0.0807 pounds (or about 36.5 grams) of weight due to its buoyancy in a denser medium, like water. This is based on the average density of air at sea level, which is about 0.0807 pounds per cubic foot. In practical terms, this means that if you have a balloon filled with air that displaces one cubic foot, it can lift that amount of weight.
Yes, air does have weight. Although we don't typically perceive it, air is composed of molecules that exert pressure and have mass. The weight of air can be measured, and it contributes to atmospheric pressure, which is the force exerted by the weight of the air above a given point. For example, one cubic meter of air at sea level weighs about 1.2 kilograms.
6 lbs
1 cubic foot of air will support 62 lbs
7000