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If you were to plot how either pressure or volume relates to temperature, you would find something fairly obvious: pressure decreases with temperature, and so does volume (at least in an isolated system in which all other variables are kept constant). Furthermore, you could do some analysis on this relation using the chi square, or linear interpolation to obtain the trend line. If you then extrapolate until you can find where it intercepts the axis (just like you can do with our slope intercept calculator), you will find that the temperature at which the volume and pressure would be 0 is the same for most materials:
The dew point temperature determines what combinations of temperature and RH will be possible in the storage environment. At a constant dew point, when the temperature goes up, the RH goes down and when the temperature goes down, the RH goes up. Controlling the dew point is key to managing the risk of material decay. What's your dew point? If you know the T & RH in your space you can use the DP Calculator to get the DP. If your building does not have humidification or dehumidification, the indoor dew point is the same as the outdoor dew point. (Source: www.dpcalc.org)
This whole relationship between pressure, temperature, volume (and density for that matter) is best explained by the ideal gas law equation, at least in a perfect world. By using this calculator together with the air density and drag calculators you could easily see how a change in temperature can significantly change the results of an experiment, such as a free fall with air resistance. This is easy to correct for, but if you don't do it, you might end up with strange values for the gravitational force of the Earth. In this case, the problem would be due to the difference in buoyancy force resulting from the difference in air density.
One of the most common ways to measure it, or at least one of the oldest, is through thermal expansion. Since most materials will enlarge as temperature rises, one can carefully design a container or a table of calibrated markings that can translate from size (typically volume of length) into temperature. This is how mercury and alcohol thermometers work. This method has some limitations like the temperature range, the need to be in contact with the heat source to determine its temperature, and, most notably in our day and age, it is really hard to get any kind of electrical or digital reading of it. (Source: www.omnicalculator.com)