4 ms·
Was this ever reproduced properly? I remember in my first year of physics some people had taken this experiment has class project. No one was able to reproduce
by lpgauth 17y ago
Was this ever reproduced properly?
I remember in my first year of physics some people had taken this experiment has class project. No one was able to reproduce that "effect".
- KiwiNige 17y agoWhen I was growing up it was a known phenomenon in my family that hot water pipes would freeze before cold pipes in winter. And that using hot water to de-ice your car would cause it to freeze up again more than cold water. It's something I've always been meaning to test out properly to see if it was real.
- baddox 17y agoHot water pipes have water running through then less often. Hot water might cause your car windows to fog up, but I doubt the Mpemba effect, even if it's real, could be noticed in that situation.
- showerst 17y agoThe straight dope did a column on this, and later amended it with Scientific American results: http://www.straightdope.com/columns/read/422/which-freezes-faster-hot-water-or-cold-water http://www.straightdope.com/columns/read/422/which-freezes-f...
- chriskelley 17y agoI worked at a hockey rink growing up, and the ice machines lay down a sheet of hot water after the auger scrapes off the top layer of old ice. I was always told the reasoning was that it froze faster... hardly scientific, but that's the standard in the rink-management world.
- harpastum 17y agoThe reason the water is hot is to melt the top layer of ice, so when it does freeze, it's a smoother, flatter sheet. http://en.wikipedia.org/wiki/Ice_resurfacer#Technology http://en.wikipedia.org/wiki/Ice_resurfacer#Technology
- mitko 17y agoRight. Argue against a Wikipedia article with another Wikipedia article...