University Physics with Modern Physics (14th Edition)

14th Edition

ISBN: 9780321973610

Author: Hugh D. Young, Roger A. Freedman

Publisher: PEARSON

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Chapter 13, Problem 13.80CP

CP Tidal Forces near a Black Hole. An astronaut inside a spacecraft, which protects her from harmful radiation, is orbiting a black hole at a distance of 120 km from its center. The black hole is 5.00 times the mass of the sun and has a Schwarzschild radius of 15.0 km. The astronaut is positioned inside the spaceship such that one of her 0.030-kg ears is 6.0 cm farther from the black hole than the center of mass of the spacecraft and the other ear is 6.0 cm closer. (a) What is the tension between her cars? Would the astronaut find it difficult to keep from being torn apart by the gravitational forces? (Since her whole body orbits with the same angular velocity, one ear is moving too slowly for the radius of its orbit and the other is moving too fast. Hence her head must exert forces on her ears to keep them in their orbits.) (b) Is the center of gravity of her head at the same point as the center of mass? Explain.

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Chapter 13, Problem 13.79CP

Chapter 13, Problem 13.81CP

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A spacecraft in the shape of a long cylinder has a length of 100 m, and its mass with occupants is 1 500 kg. It has strayed too close to a black hole having a mass 102 times that of the Sun. The nose of the spacecraft points toward the black hole, and the distance between the nose and the center of the black hole is 10.0 km. Black hole -100 m- (a) Determine the total force on the spacecraft. N 10.0 km (b) What is the difference in the gravitational fields acting on the occupants in the nose of the ship and on those in the rear of the ship, farthest from the black hole? (This difference in acceleration grows rapidly as the ship approaches the black hole. It puts the body of the ship under extreme tension and eventually tears it apart.) N/kg

Nothing can escape the event horizon of a black hole, not even light. You can think of the event horizon as being the distance from a black hole at which the escape speed is the speed of light, 3.00 × 108^8 m/sm/s, making all escape impossible. What is the radius of the event horizon for a black hole with a mass 7.5 times the mass of the sun? This distance is called the Schwarzschild radius.

A spacecraft in the shape of a long cylinder has a length of 100 m, and its mass with occupants is 1 050 kg. It has strayed too close to a black hole having a mass 103 times that of the Sun. The nose of the spacecraft points toward the black hole, and the distance between the nose and the center of the black hole is 10.0 km. Black hole -100 m 10.0 km (a) Determine the total force on the spacecraft. A black hole can be treated in the same manner as any other point mass and used in the equation for the gravitational force as long as you are outside the Schwarzschild radius. N (b) What is the difference in the gravitational fields acting on the occupants in the nose of the ship and on those in the rear of the ship, farthest from the black hole? (This difference in acceleration grows rapidly as the ship approaches the black hole. It puts the body of the ship under extreme tension and eventually tears it apart.) N/kg

Chapter 13 Solutions

University Physics with Modern Physics (14th Edition)

Ch. 13.1 - The planet Saturn has about 100 times the mass of...Ch. 13.2 - Rank the following hypothetical planets in order...Ch. 13.3 - Prob. 13.3TYU Ch. 13.4 - Prob. 13.4TYU Ch. 13.5 - The orbit of Comet X has a semi-major axis that is...Ch. 13.6 - In the classic 1913 science-fiction novel At the...Ch. 13.7 - Imagine a planet that has the same mass and radius...Ch. 13.8 - If the sun somehow collapsed to form a black hole,...Ch. 13 - A student wrote: The only reason an apple falls...Ch. 13 - If all planets had the same average density, how...

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