I was recently writing about the relationship between relative humidity and temperature...as you do.
Relative humidity is a measure of how much water is in the air around you versus how much there could theoretically be.
How much there could theoretically be in the air varies with temperature. On a hot day there can be a lot of water in the air, and a cold day there might not be much at all. Compare a light drizzle in Melbourne's winter to a Tropical thunderstorm.
After a lot of mathematics you end up with 2 curves that combine to make a 3 dimensional object that tells you for any given relative humdity and temperature how much water is in the air. When you run that into some graphing software, it looks a little like a wonky pyramid.
Course if you can draw it in 3D dimensions you can print one out too! Swipe right a few to have a look, and if you want to print one out for yourself, the STL is on the website.
So why is any of these important? Well water plays a big role in the amount of heat you need to apply to a roaster and when. The first step to controlling it, is measuring how much you have. - 6 hours ago