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Physics, 13.03.2020 02:03 jenna34032
Small birds 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 Calories, compared to 4.20 Calories per 1.00 grams of carbohydrate. (a) Consider a bird that ies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W. Assume that the bird consumes 4.00 g of fat, how far will the bird y before feeding again? (b) How many grams of carbohydrate would the bird have to consume to travel the same distance. (c) Field observations suggest that a migrating ruby-throated hummingbird can y across the Gulf of Mexico on a nonstop ight traveling a distance of about 800 km. Assuming that the bird has an average speed of 40.0 km/hr and an average power consumption of 1.70 W, how many grams of fat does a ruby-throated hummingbird need to accomplish the nonstop ight across the Gulf of Mexico? [455 km, 8.95 g, 3.11 g]
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