david.atwell Posted March 8, 2016 Share Posted March 8, 2016 Split out from http://forums.getpaint.net/index.php?/topic/107595-measurement-ruler-on-image-um-units . The metric system is taught in Elementary (primary) School, so we all understand it. However, since the imperial system is so dominant here, we all tend to think in terms of imperial units. Very true. I've always thought of Metric (SI) as being better for scientific pursuits, but Imperial as better for daily life. For instance, Fahrenheit is pretty well calibrated to a human being's survivability range (0° being an average temperature for the coldest areas humans tend to habitate, 100° being an average temperature for the warmest). Similarly, the foot is an easy measure of distance for a human to approximate (since an adult human's foot is within a reasonable approximation of one foot long), and a mile is about the average distance a human eye can effectively distinguish objects. A pound is about the weight of your hand, which makes it easy to approximate, and a second (which the SI uses as well) is a good approximation at the time it takes for a human to perform a complete action (about 0.25s to register and interpret a visual signal, another 0.25s to formulate a response, and about 0.5s for your body to complete the motion).It's not even close to perfect, for sure, but it doesn't have to be. Imperial is for life. SI is for science. Quote The Doctor: There was a goblin, or a trickster, or a warrior... A nameless, terrible thing, soaked in the blood of a billion galaxies. The most feared being in all the cosmos. And nothing could stop it, or hold it, or reason with it. One day it would just drop out of the sky and tear down your world.Amy: But how did it end up in there?The Doctor: You know fairy tales. A good wizard tricked it.River Song: I hate good wizards in fairy tales; they always turn out to be him. Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.