Pat wrote: >When you are sleeping you are still using energy at about 250 joule per hour >to keep your basic metabolism operating; this goes up to about 335 J/h when >you are sitting, and about 500 J/h when standing. This increases to between >800 J/h and 1 600 J/h when you walk depending on whether you are on flat >ground or going uphill. Running needs about 2 000 J/h. >Your day of energy use might go something like this: 8 hours sleep uses >2�000�J; 4 hours of standing at work takes 2�000�J; 4 hours of walking at >work takes 3�200 J; 4 hours of reading, writing, and watching TV uses >1�340�J; 1 hour of vigorous exercise takes 2�000�J; and 3 hours of eating >dressing and chatting takes 1�500�J; altogether this day would use about >12�000�J or 12�kilojoules of energy.
A normal person will use somewhere in the ballpark of 2000 dietary calories per day, which is about 8 MJ. This works out to an average rate of about 100 W, or 360 kJ/h. Carl
