In many parts of the world, having a refrigerator is part of everyday life. But in China, only 7% of people in cities had refrigerators in 1995. Now that number is over 95%. Writer Nicola Twilley has an article in the New York Times about how this simple technology has changed everything.
We tend to think of Albert Einstein has a highfalutin theoretical physics guru, but the physicist also worked on much more everyday tasks...like developing an energy-efficient refrigerator. Allow Jennifer Ouellette from Cocktail Party Physics to explain.
Refrigerators are the source of much joy in the world, and the fridge is made possible by continually-cycled, selectively-pressurized gas. But someday, sound waves may replace this system in your fridge.