What is the approximate mass of air in a living room 4.8 m

Chapter 4, Problem 2P

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QUESTION:

Problem 2P

What is the approximate mass of air in a living room 4.8 m × 3.8 m × 2.8 m?

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QUESTION:

Problem 2P

What is the approximate mass of air in a living room 4.8 m × 3.8 m × 2.8 m?

ANSWER:

ANSWER: The mass of the book is 2 kg. The height of the table is 0.75 m. When you lift the book upwards, the work is done by you and considered as a positive work, because you did work against gravity. When you bring the book downward, the work is done by the book and also considered as negative work, because you did the work for gravity. These are the ways we have defined gravitational potential energy has defined. a)

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