Chemical Engineering in Daily Life – Question 60: Why does fanning oneself make us cooler in summer?
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The fan has a breeze; hold it in your hand. If you wish to borrow it, wait until the beginning of winter. Why have people used fans to cool themselves in the summer since ancient times?
Good evening, teacher. --------------------------------- The wind increases surface evaporation, which carries away heat; this is similar to the principle of an air heat exchanger
The teacher asked an additional question: at this time, is it more comfortable to have wet arms or dry arms?
Try to answer as many questions as possible; this helps maintain the teacher’s enthusiasm, and it also allows one to ask questions of the teacher. Let’s see if Teacher Bundo can do that
If I answer right away, it might seem like I’m revealing the correct answer; let’s wait a bit longer.
I just went to brush my teeth ---------------------------- Regarding brushing teeth: Why wasn’t it obvious before when brushing, but now is it easier to remove plaque? The teacher can bring up another topic
Haha, better not ask me about principles of chemical engineering, inorganic chemistry, physical chemistry, thermodynamics in chemical engineering, principles of mass transfer, mathematical methods in chemical engineering, and things like that. I’ve taken these courses twice each, and I still use the knowledge from them every day. I am also good at geography, history, international politics, poetry, and so on; I’m no worse than typical graduate students in liberal arts programs today. It’s a shame this is a chemical engineering forum; I can’t show off. I remember that in elementary school, I immediately corrected the teacher by saying that \"Sima Yi was not Zhuge Liang’s advisor,\" and as a result I got beaten with a ruler several times. It’s just that my handwriting is too poor; maybe I should switch to the humanities. Anyway, bragging online isn’t taxed.
This post was last edited by *nht1 on 2015-9-1 at 11:27. The vaporization of water on the skin surface requires heat absorption; fanning accelerates the flow of the gas phase, which helps to reduce the vapor pressure of the gas phase at the surface. This disrupts the balance between the gas and liquid phases, breaks the saturation of the gas phase vapor, and thus facilitates further vaporization of the water.
Do we have to make it such a serious matter? That’s quite good
Teacher, I just love the way you brag – it’s so impressive