Bernoulli’s principle states that an increase in the speed of air results in a decrease in its pressure. This principle, formulated by Daniel Bernoulli in the 18th century, explains various natural and engineered phenomena, including how airplanes generate lift, how carburetors mix air and fuel, and even how a person can inflate a large sleeping bag with minimal effort. When blowing air into the opening of the sleeping bag, the fast-moving air reduces pressure in that area, causing surrounding a