ΣΥΝΕΧΙΖΟΥΜΕ...

ΣΥΝΕΧΙΖΟΥΜΕ...
ΣΥΝΕΧΙΖΟΥΜΕ...

Δευτέρα 7 Δεκεμβρίου 2015

γνώση

If you are thinking of cooking some pasta while you are in the mountains,  you might want to check the altitude before you set a timer for your water. In other words, water boils at a lower temperature in the mountains. 🍝 🔥😄“The boiling point of water, or any liquid, varies according to the surrounding atmospheric pressure. A liquid boils, or begins turning to vapor, when its internal vapor pressure equals the atmospheric pressure. For instance, when you heat your tea kettle on a stovetop, you’re creating more water vapor; when the water’s vapor pressure rises enough to exceed the surrounding air pressure, bubbles start to form and the water boils.But pressure drops as you gain elevation – say, by driving from Los Angeles to Denver – because there are fewer air molecules pressing on you. In Denver, the atmospheric pressure is only about 12 pounds per square inch, compared with 14.7 pounds per square inch in Los Angeles. With that much less pressure, you don’t need to apply as much heat to push vapor pressure beyond the surrounding atmospheric pressure – in other words, water boils at a lower temperature. " (Pew Research)
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