Hand Boilers (Colors May Vary)

Product Information

Spiel, Physik und Spaß: Physik zum Mitdenken und Nachmachen[ Playing, physics and fun: physics to follow along and replicate] (in German).

Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Since the liquid both evaporates and condenses at relatively cool temperatures while in an enclosed system, the boiler can be turned upside down, and the top end can be placed in ice water.The hand boiler is an intriguing physics demonstration that is perfectly suited to the high school classroom.

The boiler consists of a larger lower bulb and smaller upper bulb, connected together by a twisting glass tube. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development.When holding the bottom of the boiler with your hand, the liquid inside becomes exposed to the heat of your hand and it begins to evaporate. To force the liquid in the top bulb to go back down into the bottom bulb, hold the top bulb with your hand and the heat of your hand will increase the liquid pressure in the top bulb and force the liquid back down into the bottom bulb.

As a result it shoots up the glass tube and settles in the top bulb, since it cannot go any further. When held upright (with the smaller bulb on top), the liquid will move from the bulb with the higher pressure to the bulb with lower pressure. Der Kaffeekugelschreiber oder das Liebesthermometer" [The coffee-percolator pen or the love thermometer]. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. With a hand boiler, the temperature of your hand is enough to cause the liquid to bubble and appear to boil. If you have cold hands the hand boiler will not work as well since the heat from your hand is not high enough to cause the liquid to evaporate and boil.