Small birds can migrate over long distances without feeding,storing energy mostly as fat rather than carbohydrate. Fat is agood form of energy storage because it provides the most energy perunit mass: 1 gram of fat provides about 9.4 (food) Calories,compared to 4.2 (food) Calories per 1 gram of carbohydrate.Remember that Calories associated with food, which are alwayscapitalized, are not exactly the same as calories used in physicsor chemistry, even though they have the same name. Morespecifically, one food Calorie is equal to 1000 calories ofmechanical work or 4186 joules. Therefore, in this problem use theconversion factor 1 calorie = 4186 J.
Consider a bird that flies at an average speed of 10.7 and releasesenergy from its body fat reserves at an average rate of 3.70 (thisrate represents the power consumption of the bird). Assume that thebird consumes of fat to fly over a distance without stopping forfeeding. How far will the bird fly before feeding again? Expressyour answer in kilometers.
How many grams of carbohydrate would the bird have to consume totravel the same distance ? Express your answer in grams
Small birds can migrate over long distances without feeding,storing energy mostly as fat rather than carbohydrate. Fat is agood form of energy storage because it provides the most energy perunit mass: 1 gram of fat provides about 9.4 (food) Calories,compared to 4.2 (food) Calories per 1 gram of carbohydrate.Remember that Calories associated with food, which are alwayscapitalized, are not exactly the same as calories used in physicsor chemistry, even though they have the same name. Morespecifically, one food Calorie is equal to 1000 calories ofmechanical work or 4186 joules. Therefore, in this problem use theconversion factor 1 calorie = 4186 J.
Consider a bird that flies at an average speed of 10.7 and releasesenergy from its body fat reserves at an average rate of 3.70 (thisrate represents the power consumption of the bird). Assume that thebird consumes of fat to fly over a distance without stopping forfeeding. How far will the bird fly before feeding again? Expressyour answer in kilometers.
How many grams of carbohydrate would the bird have to consume totravel the same distance ? Express your answer in grams
