tag:blogger.com,1999:blog-3915442507015152354.post462109711586801525..comments2024-03-08T07:38:27.911-07:00Comments on Community Collaborative Rain, Hail & Snow Network: Wild Temperature SwingsJulianhttp://www.blogger.com/profile/05273644010979074747noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3915442507015152354.post-28686860251361387412009-01-19T08:21:00.000-07:002009-01-19T08:21:00.000-07:00Tossing a cup of boiling water into cold air and w...Tossing a cup of boiling water into cold air and watching it "instantly" evaporate is an example of extreme vapor pressure and surface-to-volume. The greater the vapor pressure and surface area, the faster the evaporation. On the air side, vapor pressure is increased when the air is as dry as possible-- in this case extreme cold. On the water side, vapor pressure is increased by raising it's temperature as high as possible-- in this case to boiling. And then a big wide toss spreading out the water in a big thin sheet completes the recipie, and bang! Instavapor!<BR/><BR/>On a similar note, there's an old wives tale that boiling water will freeze faster than cold water. It won't-- as long it's the same amount of water with the same exposure to the cold.<BR/><BR/>But if a large tray of boiling water is left out on a cold dry day, then a lot of that water will evaporate quickly. And what's left will freeze faster simply because there's less water left to freeze. It takes a lot of energy to freeze water, and a simple way to freeze faster is start with less water!Unknownhttps://www.blogger.com/profile/17020650831982108198noreply@blogger.comtag:blogger.com,1999:blog-3915442507015152354.post-56045471007623098872009-01-18T14:52:00.000-07:002009-01-18T14:52:00.000-07:00Chris,I wasn't going to comment on fog, but on spa...Chris,<BR/>I wasn't going to comment on fog, but on space weather as the Cocorahs site mentioned. There is a great site for space weather and solar activity. I am one of those nerds who find this stuff exciting. It is a NASA site and if you Google and enter Heliospheric, you will be able to access the Heliospheric lab site. There is also info on comets and transits of planets. As far as fog is concerned, we are having bouts of ice fog. It is coating the streets and wires and causing auto accidents and power outages. It also produces ice crystals that appear to be snow flurries, but they are much lighter. If you can catch one, you can see the crystals. Cool stuff.BettyAnnehttps://www.blogger.com/profile/09721330416931999543noreply@blogger.comtag:blogger.com,1999:blog-3915442507015152354.post-59348137674439199842009-01-17T09:13:00.000-07:002009-01-17T09:13:00.000-07:00Just so you know, I tried this last night myself (...Just so you know, I tried this last night myself (originally I only read about it on the internet). I was unable to get any photos because the bubbles of course blow around quite unpredictably...and I couldn't quite convince my photographer friend to help me in the -15 weather...what kind of friend is he, anyway? ;)<BR/><BR/>The soap bubbles freeze into a plastic-like consistency, and rather than popping with a burst and a splatter, they sort of collapse on themselves. They also get pretty frost formations on them as they freeze--the feathery pattern like you see on windows--that's if you can stay close enough to one to watch it, or capture on on your bubble-maker without popping it.<BR/><BR/>Hours of entertainment!Anonymousnoreply@blogger.com