Mastering Physics Solutions: Problem 6.73

Mastering Physics Solutions: Problem 6.73

On March 16, 2014, in Chapter 05: Work and Energy, by Mastering Physics Solutions

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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Mastering Physics Solutions: The Work Done in Pulling a Supertanker

Mastering Physics Solutions: The Work Done in Pulling a Supertanker

On October 5, 2013, in Chapter 05: Work and Energy, by Mastering Physics Solutions

Part A = 1.65 * 10^9 J

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

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Mastering Physics Solutions: Energy Required to Lift a Heavy Box

Mastering Physics Solutions: Energy Required to Lift a Heavy Box

On March 2, 2013, in Chapter 05: Work and Energy, by Mastering Physics Solutions

Part A = F = mg/2
Part B = Wd / Wp = 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 Wd / Wp, the ratio of the work done lifting the box directly to the work done lifting the box with a pulley?

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Mastering Physics Solutions: Fat: The Fuel of Migrating Birds

Mastering Physics Solutions: Fat: The Fuel of Migrating Birds

On February 23, 2013, in Chapter 05: Work and Energy, by Mastering Physics Solutions

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 db without stopping for feeding. How far will the bird fly before feeding again?
How many grams of carbohydrate mcarb would the bird have to consume to travel the same distance db?
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?

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Mastering Physics Solutions: Question 17.6

Mastering Physics Solutions: Question 17.6

On February 15, 2012, in Chapter 17: Electric Current and Resistance, by Mastering Physics Solutions

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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Mastering Physics Solutions: Exercise 16.10

Mastering Physics Solutions: Exercise 16.10

On February 15, 2012, in Chapter 16: Electric Potential, Energy, and Capacitance, by Mastering Physics Solutions

Part A = -2.3 J Click to use the calculator/solver for this part of the problem

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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