Final answer:
Rick's exact calorie expenditure during light- to moderate-intensity weight lifting cannot be calculated without his specific weight. Generally, such physical activity falls between 200 to 400 kcal burned per hour, varying by individual weight and exercise intensity.
Step-by-step explanation:
The student asks about the number of kcalories expended per hour during light- to moderate-intensity weight lifting based on Rick's current weight. Without Rick's specific weight, we can't provide an exact number. However, general estimates based on average weight categories can be referenced from physical activity guidelines or related resources that provide caloric expenditure rates for different types of activities and body weights. For example, a moderate-intensity strength training exercise typically burns between 200 to 400 kcal per hour, depending on the individual's weight and intensity of the exercise. To provide a more precise answer, Rick's weight and the corresponding metabolic equivalent (MET) value would need to be known.