Main Page | See live article | Alphabetical index Imponderables is a series of 9 books written by David Feldman. The books examine and explain how and why common phenomena, such as blowing on soup making it cool, work. The books are effecitvely a frequently asked questions list for people growing up and wondering why the world works as it does. The books in the series are: Imponderables Why Do Clocks Run Clockwise When Do Fish Sleep? Why Do Dogs Have Wet Noses? Do Penguins Have Knees? When Did Wild Poodles Roam the Earth? How Does Aspirin Find a Headache? What Are Hyenas Laughing At, Anyway? How Do Astronauts Scratch an Itch? Imponderables covered by Wikipedia articles Food How does blowing on soup cause it to cool? See equilibrium. There is equilibrium between the vapor in the air and the water in the soup. When you blow away the moist air, more water can evaporate and the soup is cooled by the amount of energy required to vaporise that much water. External links Imponderables website This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.