I guess you mean how long do you have to run to burn off 4000 KJ. Well first off 4000 KJ is equal to 955 food calories. Also, for every mile you run, you burn off an average of 100 calories along with it. Although the amount of calories burned all depends on age, sex, weight, temerature, terrain(hilly, offroad , ect), and also weather (windy, rainy, ect). If you do the math, you would have to run 9.55 miles to burn off 955 calories (4000KJ).
as long as it take for them to burn haha as long as it take for them to burn haha as long as it take for them to burn haha as long as it take for them to burn haha
a millisecond
it takes 2 minutes for it fully to burn
About 2,000,000
Depends on your weight, gender, age, fitness level etc, but not that much. Let's say an average burn during running is 600 cals/hour. Now, running a mile isn't going to take you that long, maybe 10 minutes or so. So you're looking at a burn of maybe 100 calories or thereabouts.
Its take a lot of training for long distance running such as your breathing training for long distance you have to learn how to breath for the running and of course the training for the running it usually takes a month for the training.
10 Minutes
Depends on what you are doing and how hard you are exercising. I have a running watch that estimates calorie burn and it typically tells me about 100 calories per mile. So a 15 mile run would do it for you.
60 miles every hour 4000/60 = 66.67 hours
2 days
15 days ...... 4000 miles
61 hours 32 minutes.