Problem

For lunch, your friend, who has a mass of 70.0 kg, has a slice of pizza, a cola soft drink...

For lunch, your friend, who has a mass of 70.0 kg, has a slice of pizza, a cola soft drink, and ice cream.

Item

Carbohydrate (g)

 Fat (g)

 Protein (g)

Piza

29

10.

13

Cola

51

0

0

Ice cream

44

28

8

a. Using Table 1, calculate the total kilocalories for each food type in this meal (round off the kilocalories to the tens place).


b. Determine the total kilocalories for the meal (round off to the tens place).


c. Using Table 2, determine the number of hours of sitting needed to burn off the kilocalories in this meal.


d. Using Table 2, determine the number of hours of swimming needed to burn off the kilocalories in this meal.

Table 1 Energy Values for the Three Food Types

Food Type

(kJ/g)

(kcal/g)

Carbohydrate

17

4

Fat

38

9

Protein

17

4

Table 2 Energy Expended by a 70.0-kg (154-lb) Adult

Activity

Energy (kJ/h)

Energy (kcal/h)

Sleeping

250

60

Sitting

420

100

Walking

840

200

Swimming

2100

500

Running

3100

750

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