Fat The Fuel of Migrating Birds-MC Fat The Fuel of Migrating Birds - MO Part A S
ID: 1769656 • Letter: F
Question
Fat The Fuel of Migrating Birds-MC Fat The Fuel of Migrating Birds - MO Part A Small birds like that in (Figure 1) can migrate over long rather than mass: 1.00 grams of fat provides about 9.40 (food) grams of not exactly the same as calories used in Consider a bird that flies at an average speed of 10.5 m/s and releases energy from its body fat reserves at an average rate of 3.80 Watt (his rate represents the power consumption of the bird) feeding. How far will the bird fly before feeding again? Express your answer in kilometers using three significant figures. Fat is a good form of energy that the bird consumes 3.6g of fat to fly over a distance db without stopping for to 4.20 (food) Calories per 1.00 with food, which are always Hints in this problem use the conversion factor 1 Cal = 4186 J km My Answers Give Up Part B How many grams of carbohydrate moarb Would the bird have to oonsume to travel the same Express your answer in grams using three significant figures. Hints e pageExplanation / Answer
According to the given problem,
Part:A
The problem tells us that one gram of fat has 9.4 Calories.
Each Calorie equals 4186 J,
so, that means a gram of fat contains about 39,348 J of energy,
And 3.6 grams of fat has about = 3.6*39348 = 141652.8 J of energy.
One Watt is equal to 1 joule per second, so a bird that burns energy at a rate of 3.8 W is burning 3.8 joules a second.
This means it can fly for about 37277.05 seconds (141652.8 / 3.8).
At a speed of 10.5 m/s, it will fly for about 391409.0526 m, which equals 391.41 km.
Ans: 391.409 km.
Part B:
The problem tells you that one gram of fat has about 9.4 Calories of energy, compared to 4.2 for a gram of carbs. So there is 2.2381 times as much energy in a gram of fat.
If the bird consumes 3.6 grams of fat during its flight, it would have to consume 2.2381 * 3.6 = 8.05716 grams of carbs.
Ans: 8.0572 g
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