It consisted of an arrangement for ventilating gas burners, and it must be obvious that a necessity exists for such ventilation, because every cubic foot of coal gas when burnt produces a little more than a cubic foot of carbonic acid.
But, the bottom contains 10×8 square feet and above each square foot there is a cubic foot.
The student should remember that (a) A cubic foot of water weighs 1000 ounces (avoirdupois) approximately.
Hence, a cubic foot, the unit of volume, is a solid body whose length, breadth, and thickness are each a linear foot.
If, for example, 1 cubic foot of air is allowed to expand and occupy 2 cubic feet of space, the pressure which it exerts is reduced one half.
When we measure water, we find that 1 cubic foot of it weighs about 62.
If 2 cubic feet of air are compressed to 1 cubic foot, the pressure of the compressed air is doubled.
A cubic foot of water is not a cubic foot because the measure so says, but on the contrary, the measure so says because there is a cubit foot.
Such extraordinary dryness* [The weight of vapour in a cubic foot of air was no more than .
A cubic foot of twigs," says Vaupell, "yields four times as much ashes as a cubic foot of stem wood.
The thickness of the boards is not stated, but I believe they are generally cut an inch and a quarter thick for the Quebec trade, and as they shrink somewhat in drying, we may estimate ten square for one cubic foot of boards.
Leaving out of consideration infiltrated substances, the reason a cubic foot of one kind of dry wood is heavier than that of another is because it contains a greater amount of wood substance.
It follows that the density of oven-dry wood does not represent the weight of the dry wood substance in a cubic foot of green wood.
In other words, it is not the weight of a cubic foot of green wood minus the weight of the water which it contains.
This is usually expressed in pounds per thousand board feet, a board foot being considered as one-twelfth of a cubic foot.
To quote: "A cubic foot of heated water under a pressure of from 60 to 70 pounds per square inch has about the same energy as one pound of gunpowder.
Table 11 gives the weight in vacuo and the relative volume of a cubic foot of distilled water at various temperatures.
So, too, if he reads that the atomic weight of oxygen is 16, or that a cubic foot of water weighs 62.
For instance, there is at first sight no reason why a cubic foot of water should weigh 62.
There is some reason, lying in the constitution and arrangement of its atoms, why a cubic foot of water at a given {12} spot and at a given temperature weighs 62.
How much heat will be required to raise the temperature of a cubic foot of water 10 deg.
What would a cubic foot of wood weigh if the specific gravity were 0.
A simple arithmetical calculation then determines the number of organisms in a cubic foot, since the number is known for the 1080 cubic inches.
No less than thirty colonies of organisms were counted in a cubic foot of air taken from the Golden Gallery of St. Paul's Cathedral, London, and 140 from the air of the churchyard.
A cubic foot of water weighs sixty-two and a third pounds.
On every twelve square feet a cubic foot of water was needed.
A cubic inch of water will make a cubic foot--one thousand seven hundred and twenty-eight times as much--of steam under the pressure of one atmosphere.
Another important bit of data to enter into your arithmetic: 1 cubic foot of water equals about 5 gallons.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "cubic foot" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
