Estimate the recommended daily energy intake for an average American adult (in Food Calorie/day). Estimate the average mass of an adult human (in kg). Estimate the average mass of an adult human brain (in kg). If your brain consumes the same amount of energy as any other part of your body by mass, estimate the power your brain uses (in Watt). If your brain consumes 10 times the amount of energy as any other part of your body by mass, estimate the power your brain uses (in Watt)