for a rectangular box, its simply Lenght x Height x Width. If the dimensions you provided are exterior dimensions, then subtract 2x the material thickness from each dimension prior to multiplying.
So for your stuff its:
(16.5 - (2 * 0.75)) x (12.5 - (2 * 0.75)) x (16.5 - (2 * 0.75)) = cubic inches
Then you can take cubic inches and divide by 1728 to get cubic feet
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The formula for air space is simply the volume of air contained within a given space. This can be calculated using the formula for volume, which is length x width x height.
No air The space suit has air bottles
Tornadoes cannot form in space. A tornado is a vortex of air. There is no air in space.
An aircraft is designed to fly in 'air' there is no 'air' in space.
Space is mostly a vacuum with very low density of gas particles, including air. The Earth's atmosphere extends to a certain distance from the planet, but beyond that, there is very little air in space. Astronauts in space rely on life support systems to provide them with breathable air.
Rockets work better in space than in air. In space, rockets don't have to overcome the resistance caused by air, allowing them to achieve higher speeds and more efficient propulsion. In contrast, in the Earth's atmosphere, rockets have to fight against air resistance which hinders their performance.