Course Home KCH 6 Work Fat: The Fuel of Migrating Birds Constants Y Pa Small bir
ID: 3307510 • Letter: C
Question
Course Home KCH 6 Work Fat: The Fuel of Migrating Birds Constants Y Pa Small birds like that in (Figure 1) can migrate over long distances without feeding, storing energy mostly as fat rather than carbohydrate. Fat is a good form of energy storage because it provides the most energy per unit mass: 1.00 grams of fat provides about 9.40 (food) Calories, compared to 4.20 (food) Calories per 1.00 grams of carbohydrate. Remember that Calories associated with food, which are always capitalized, are not exactly the same as calories used in physics or chemistry even though they have the same name. More specifically, one food Calorie is equal to 1000 calories of mechanical work or 4184 joules. Therefore, in this problem use the conversion factor 1 Cal =: 4184 J. Cor the bef Ex Figure Pa 1 of 1 How ExpExplanation / Answer
A) Time t = energy/power
Distance = vt= 10.7 x 157393.6/3.7 = 455165.3 m
Therefore, distance = 455.165 km
(If this is realistic it's pretty amazing. But then, hummming birds are known to cross the Gulf of Mexico in a single ~800 km flight)
B) mcarb*4.2 cal/g = mfat*9.4 cal/g
mcarb = 4 x 9.4/4.2 = 8.952 g
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