About this iReport
  • Approved for CNN

  • Click to view mediaman's profile
    Posted January 7, 2014 by
    Chaseburg, Wisconsin
    This iReport is part of an assignment:
    Wintry weather 2014

    More from mediaman

    Boiling Water Captured Freezing in -13 Degree Midwestern Air


    CNN PRODUCER NOTE     mediaman shot these Monday night, Oct. 6, outside the back of his house in Chaseburg, Wisconsin. 'I held a glass measuring cup in my left hand, and shot the photos with my camera in my right with a flash. I set the camera to rapid fire ... It works better with two people, but who wants to be out in the freezing cold shooting photos?'
    - dsashin, CNN iReport producer

    As the Midwest continues its deep freeze, it opened the opportunity to conduct a science experiment on the concept that boiling water freezes faster than cold. Outside of La Crosse, Wisconsin, I decided to test this by shooting a series of images of boiling water being tossed up into the freezing air.


    By not boiling the water too much, some of the images captured water droplets falling back to the ground, followed by a trail of freezing vapor. In an instant, most of the boiling “vaporized” into a mist of snow.


    This concept of hot water freezing faster than cold is called the Mpemba effect as explained on the website Phys.org. The web site states “the Mpemba effect was first noted in the 4th century BC by Aristotle, and many scientists have noted the same phenomenon in the centuries since Aristotle’s time. It was dubbed the Mpemba effect in the 1960s when schoolboy Erasto Mpemba from Tanzania claimed in his science class that ice cream would freeze faster if it was heated first before being put in the freezer.”


    These images were taken in a -31 degree wind chill.

    Add your Story Add your Story