Part A = 3062 J

If the average book has a mass of 1.4 kg with a height of 22 cm, and an average shelf holds 29 books, how much work is required to fill all the shelves, assuming the books are all laying flat on the floor to start?

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Part A = 1.65 * 10^9 J

What is the total work done by the two tugboats on the supertanker?

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Part A = F = mg/2

Part B = W_{d} / W_{p} = 1.00

What is the magnitude F of the upward force you must apply to the rope to start raising the box with constant velocity?

What is W_{d} / W_{p}, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?

Part A = 455.165 km

Part B = 8.9523 g

Part C = 3.1107 g

Consider a bird that flies 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 (this rate represents the power consumption of the bird). Assume that the bird consumes 4g of fat to fly over a distance d_{b} without stopping for feeding. How far will the bird fly before feeding again?

How many grams of carbohydrate m_{carb} would the bird have to consume to travel the same distance d_{b}?

Field observations suggest that a migrating ruby-throated hummingbird can fly across the Gulf of Mexico on a nonstop flight 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 flight across the Gulf of Mexico?

Part A = 84 J

To move 7.0 C of charge from one electrode to the other, a 12-V battery must do how much work?

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How much work is required to completely separate two charges (each -1.5 μC ) and leave them at rest if they were initially 9.0 mm apart?

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