Explanation Given info: The initial radius of the comet is 0.590 AU and the final radius is 35.0 AU . The angular momentum of the comet about the Sun is constant and the gravitational force Exerted by the Sun has zero momentum. The initial speed of the comet is 54.0 km / s . Write the expression for the conservation law of angular momentum. L 1 = L 2 (1) Here, L 1 is the initial angular momentum of comet. L 2 is the final angular momentum of comet. Write the expression for initial angular momentum of comet. L 1 = m v 1 r 1 Here, m is the mass of the comet. v 1 is the initial velocity of comet. r 1 is the initial radius. Write the expression for final angular momentum of comet. L 2 = m v 2 r 2 Here, m is the mass of the comet. v 2 is the final velocity of comet. r 2 is the final radius. Substitute m v 1 r 1 for L 1 and m v 2 r 2 for L 2 in equation (1)

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Author: Raymond A. Serway, John W. Jewett

Publisher: Cengage Learning

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Chapter 11, Problem 11.45AP

To determine

The speed of comet when it is farthest from the Sun.

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Chapter 11 Solutions

Physics for Scientists and Engineers

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