I need to know how thick the layer of gravel is meant to be.
That's not enough information. You need to know the width of the trench, and how much volume 1 ton of gravel is equivalent to.
u need to figure 1-ton per every 600 square feet
Knowing that 1 cubic foot is pretty much equal to 100 pounds or 0.05 ton, 1 ton of gravel is around 20 cubic feet.
Yes
There are many factors that need to be taking into your question. Such as insulation factor, how many exterior walls, demographics... Typically 1 ton of an air conditioner will remove heat from 500 square feet. 1800 square feet will need a 3.6 ton unit but they only make air units in half ton increments. You will need a 4 ton unit.
There are approximately 42.6 cubic feet in 2.13 tons. This conversion is based on the fact that 1 ton is equivalent to 20 cubic feet.
To convert 1 ton of CO2 to cubic feet, you would need to know the density of CO2 at the given temperature and pressure. Typically, at room temperature and atmospheric pressure, 1 ton of CO2 is approximately equivalent to 515 cubic feet.
I need to know how thick the layer of gravel is meant to be.
One ton is a unit of weight. Square Feet is a unit of space. You cannot convert the two without knowing more information such as a tone of what will cover such and such square feet, a ton of insulation will cover this much square feet to this depth. etc...
How many square feet will a ton of salt cover?
The number of square feet in one ton of livestock grain will depend on the density of the specific type of grain being used. To calculate this, you would need to know the weight of one square foot of the grain, and then divide one ton (typically 2,000 pounds) by that weight to determine the number of square feet covered by one ton.
feet are length , ton is weight
You need to know the dimensions and the mass of each piece.
It depends on the height of the ceilings but for the average 8 to 12 foot ceilings the rule that is used is 1-ton for every 500 square feet, so you would need a 4.8-ton a/c unit or you could get by with (2) 2-ton units again depending on the height of the ceilings........
One ton of granite is equivalent to approximately 36 cubic feet.
That's not enough information. You need to know the width of the trench, and how much volume 1 ton of gravel is equivalent to.