Instead of trying to directly create or remove heat, a heat pump uses a relatively small amount of energy to simply move (or pump) heat from one place to another. (treehugger.com)
A food that provides a high degree of energy will require a higher amount of calcium and a food that provides smaller amounts of energy should have lower amounts of calcium. (vetinfo.com)
The batteries also make up a small fraction of the device's weight and cost, regulating small amounts of energy. (scientificamerican.com)