Like a lot of people, I like to make coffee in the morning. I generally brew about two cups, then drink ‘em slowly over the course of several hours. My coffee-maker keeps them nice and hot. But it occurred to me, that maybe it’s more energy-efficient to turn the coffeemaker off after it’s done brewing, then reheat my coffee in the microwave. Which uses more energy?
The calculation is pretty simple, actually. Electrical devices usually inform you of the amount of power they consume. But power is not the same as energy; power is the rate at which energy is consumed.
