Answer:
Step-by-step explanation:
To determine how many minutes of light activity can be sustained by the energy provided by a serving of chicken noodle soup, we need to calculate the total energy content of the soup in kilojoules (kJ).
The energy content of protein is approximately 17 kJ/g, the energy content of carbohydrates is approximately 16 kJ/g, and the energy content of fat is approximately 37 kJ/g.
So, to calculate the energy content of the soup, we need to multiply the number of grams of each macronutrient by its energy content:
Energy content of protein = 13 g × 17 kJ/g = 221 kJ
Energy content of carbohydrates = 15 g × 16 kJ/g = 240 kJ
Energy content of fat = 5 g × 37 kJ/g = 185 kJ
Total energy content of soup = 221 kJ + 240 kJ + 185 kJ = 646 kJ
Now we can divide the total energy content of the soup by the energy expended during a minute of light activity to find out how many minutes of such activity can be sustained by the soup:
Minutes of activity = Total energy content of soup / Energy expended per minute
Minutes of activity = 646 kJ / 7 kJ/min
Minutes of activity ≈ 92.29 minutes
Therefore, a serving of chicken noodle soup containing 13 g protein, 15 g carbohydrate, and 5 g fat can sustain about 92.29 minutes of light activity, such as reading or watching television, assuming an average energy expenditure of 7 kJ/min.