One peanut releases 1,880 physicist calories, or 1.88 food calories. Energy is measured in joules. One food calorie equals 4,200 joules. So one peanut has just under 8,000 joules of energy.
By definition, the energy required to pull or push with a force of 1 newton, for a distance of 1 meter. It is a fairly small unit; for example, a 35-watt lightbulb uses 35 joules every second. (A...