String and Ice Challenge
00:00 - 02:44
2m 44s
Lester is challenged to use only a piece of string to pick up a piece of ice without touching it. USing salt, he sprinkles it on the ice and wets the string and sits it on the ice. After about 2 minutes, the string is now frozen to the ice and it can be picked up. This is because salt lowered the freezing point of water and now the water on the string can freeze to the ice cube.

Comments

Please sign in to write a comment.
Video Transcript

Related Clips

Bart and Gina visit a blacksmith to get their handcuffs removed. The blacksmith creates a key by heating up metal, shaping it in the desired manner, and then cooling it.
Bill explains the three states of matter: solids, liquids, and gases. He explains that these states differ in only the amount of energy they contain. Bill also uses several examples to illustrate the difference between the three states.
Hank explains polymers, describes some of their properties, and explains how they are formed. He also explains what you need to make a polymer: a molecule that can easily bond to another identical molecule at two points. Hank focuses on the polymer, Polyethylene, because it is the most common plastic in the world, and discusses its nomenclature.
Elsa unintentionally reveals her ice powers when Anna takes off one of her gloves. She runs away from the townspeople after a series of accidents so as not to cause more harm and lose more of the trust of her fellow townspeople.
Beakman shows how to make glue from skim milk. He explains the steps and then says the glue is from casein.