Paul who has a mass of 70kg, had a cheeseburger, fries and large drink.These items provide him with 2500 kJ of energy.
A) How long would paul have to play a computer game to waste that much energy. ( 9.0 kJ to play computer game)
B)How long would he have to run to use this much energy. (Running 12.9 km/h uses 62 kJ)

Question

Paul who has a mass of 70kg, had a cheeseburger, fries and large drink.These items provide him with 2500 kJ of energy.
A) How long would paul have to play a computer game to waste that much energy. ( 9.0 kJ to play computer game)
B)How long would he have to run to use this much energy. (Running 12.9 km/h uses 62 kJ)

anonymous · Answer

9KJ/h is the amount of energy that you will waste with computer games, but you need to know the amount of energy that is required to work the body (organs, metabolism,...). This is called Basal Metabolic Rate (BMR). It depends on different variables: http://www.shapefit.com/basal-metabolic-rate.html So you need more information to know accurately how many hours you need. FYI: When we ate something the first source of energy (ATP) comes from the glucose, after some time the body uses glycogen and fat. For example: the first 10minutes running we use the glucose in blood, when it is finished we become to use glycogen and only after 45 minutes, we will begin to use the energy of adipose tissue.