By the way you worded it, the answer is a pound of bread and here's why; since bread is a solid we know it is denser than air. You said a pound, which is the imperial measurment of mass and therefore you multiply the density of bread by mass to obtain the weight (the unit for weight is lb wt or pound weight. If you worded the question as "what weighs more a pound weight of bread or..." than your answer would be the same.
Same a pound is a pound is a pound
With a quick on-line search, I found that at 60° F, water weighs 8.338 poundsper gallon. That's 15.35 fluid ounces per pound. (rounded)To the level of precision that I'm working at right now, we can assume the densityof air to be zero, at least by comparison with the water, so that's your answer:15.35 fluid ounces, or in round numbers, let's just say: 1 pint of air to lift 1 pound.
Which air plane? A 747 weighs several hundred tonnes more than a Cessna, even with the engines removed
Weight doesn't tell you the volume. One pound of air, one pound of water, and one pound of gold all have vastly different volumes.
air, a cookie crumb or a fruit fly
The hot air expelled by congress as they lie about what they are not doing.
They weigh the same. Both are defined in your question as a pound.
It weighs exactly 1 pound and it's all free... for now!
Cold air its more dense
NO
water
Without knowing the density of the quart of material, this cannot be answered. A quart of iron weighs more than one pound, a quart of air weighs (much!) less.
It rises until the air it displaces weighs no more than the balloon and everything hanging from it weighs.
A pound of air is NOT a measure of pressure. A unit of pressure would be a weight ( a force really) for instance pound by a surface (square inch for instance). Pound is a unit of weight only. At sea level on earth barometric pressure, 1 cubic metre weighs 1.2kg (or 2.64 pound). Which means 1 pound of air represents a volume of 0.379 cubic metre of air. This obviously varies with atmospheric pressure (the air pressure) and the gravitional pull. a pound of air would represent a much bigger (6 times bigger roughly) volume on the moon for instance.
lead which is element of non metal is heavier than air
Air / Gas
no cold air is heavier because it sinks and hot air rises
The Microsoft Surface 2. The MacBook Air weighs 2 pounds, while the Surface 2 weighs about 320 pounds.