Sound waves could someday cool down your refrigerator
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. In your modern refrigerator, the gas (called a refrigerant) starts its journey outside the fridge, where it is pumped through a series of coils…