Hi there!
The mass of an average adult is 62kg. Hope this helped :D
It could be due to stress. Everyone deals with stress differently. Usually they are mad at themselves, like they have failed at supporting and that can lead to depression also.
Increases heart rate, which pumps more oxygen to the brain!
A calorie is a unit that is used to measure energy. The Calorie you see on a food package is actually a kilocalorie, or 1,000 calories. A Calorie (kcal) is the amount of energy needed to raise the temperature of 1 kilogram of water 1 degree Celsius.
Source:
https://www.scientificamerican.com/article/how-do-food-manufacturers/
