Paul and his friends ate at a fast-food restaurant. Paul, who has a mass of 70 kg, had a cheeseburger, fries, and a large drink. These items provide a total of 2500 kJ of energy. (a) How long would Paul have to play a computer game in order to use this much energy? (b) How long would he have to play tennis? How long would he have to run? (c) If Paul walked at 6.4 km/h for 2 hours, do you think he would gain or lose mass? Explain, showing your calculations.

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Spheres of physical activity

The spheres of physical activity experience include aspects of everyday life where physical activity is important. In general, the spheres recognize various purposes of physical activity in different contexts. The spheres of physical activity provide a broad basis for assessing the significance and prevalence of physical activity. There are seven spheres of physical activity experience.