Here’s an example calculation: 235 bu/ac ÷ $700/ac = .34 bushels produced per dollar spent. The result becomes more relevant when you flip the equation. The measure of efficiency now equates to ...

The efficiency of a device is a measure of how much of the input energy appears as useful output energy. The more energy a device wastes, the less efficient it is. useful output energy refers to ...

Divya Tyagi, a Penn State engineering student, has cracked a 100-year-old wind energy equation, refining Glauert’s classical model and significantly improving wind turbine efficiency.