Melatonin@lemmy.dbzer0.com to Asklemmy@lemmy.ml · 11 months agoProbably a stupid question, but will we ever have something like a microwave to make things cold? Is there a reason this can't exist?lemmy.dbzer0.comimagemessage-square203fedilinkarrow-up1363arrow-down128
arrow-up1335arrow-down1imageProbably a stupid question, but will we ever have something like a microwave to make things cold? Is there a reason this can't exist?lemmy.dbzer0.comMelatonin@lemmy.dbzer0.com to Asklemmy@lemmy.ml · 11 months agomessage-square203fedilink
minus-squareargh_another_username@lemmy.calinkfedilinkarrow-up5·11 months agoProbably to disrupt the temperature gradient that forms around the can. That’s why we blow air on though the top of a hot drink to cool it faster.
minus-squarevklortho@lemmy.worldlinkfedilinkarrow-up4arrow-down2·11 months agoHeat transfer by convection
minus-squaremanned_meatball@lemmy.mllinkfedilinkEnglisharrow-up1arrow-down2·11 months agocause it looks cooler
why the roll?
Probably to disrupt the temperature gradient that forms around the can. That’s why we blow air on though the top of a hot drink to cool it faster.
Heat transfer by convection
cause it looks cooler