A kilojoule is about 4.2 times smaller than a calorie. Find the amount of calories you need in a day and multiply that number (e.g 2000) by 4.2.
The energy required is roughly 3600 seconds/hour x24 hours/day x1 joule/second=86400 joules /day.
10000
Once a week.
seven
You need to have 4 snacks in a day breakfast, snack, lunch and tea
age, gender and activity level
They needed 4000 calories a day. We homo sapiens need 2000. Therefore we are much more efficient.
really, you really need to know that??? google it!
Base on a calorie calculator site, a 12 year old boy would need 1800 - 2200 kCal of energy from food and is 7560 - 9240 kJ per day.
What gender?
Alot ! Around 250 if you are fit, 750 if you are overweight. Lol.