Posted in Kafevend Blog
Here's a couple of quite interesting facts to amuse you with when you brew your next cup of tea or coffee:
You'd best take this one with a pinch of salt, but it still makes for an interesting experiment- apparently you can use your cup of coffee as a rudimentary barometer. In case you didn't know, barometers are instruments that measure atmospheric pressure, which can allow you to make easier predictions about future weather.
The theory is based on where the bubbles that form (unagitated by stirring) move to. If they group up in the middle, there is low pressure and you can expect rain. Conversely, if the bubbles are around the edge of the cup there is high pressure and you can enjoy the rest of your day. Unless they move out to the edge of the cup slowly, in which case you can expect scattered showers. Still holding on to that salt?
This next titbit also ties in nicely with atmospheric pressure- oh, goody, I hear you cry- and is also somewhat more reliably demonstrated. Tea and coffee drinkers who find it takes just too long to prepare that next cup would do well to move somewhere high, as the temperature that water boils at lowers as you gain altitude. At sea level, water boils at 100ºC / 212ºF. Every 500ft higher, it boils 1ºF lower. On the top of Mount Everest, you'd be ready to brew up at around 71ºC!