Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 24, Problem 11E
Imagine that you have built a large room around the people in Figure 24.4 and that this room is falling at exactly the same rate as they are. Galileo showed that if there is no air friction, light and heavy objects that are dropping due to gravity will fall at the same rate. Suppose that this were not true and that instead heavy objects fall faster. Also suppose that the man in Figure 24.4 is twice as massive as the woman. What would happen? Would this violate the equivalence principle?
Figure 24.4 Free Fall. Two people play catch as they descend into a bottomless abyss. Since the people and ball all fall at the same speed, it appears to them that they can play catch by throwing the ball in a straight line between them. Within their frame of reference, there appears to be no gravity.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
An extrasolar planet has a mass of eight times that of the Earth and radius of twice that of the Earth? What is the escape velocity of the planet if the escape velocity of the Earth is 11.2 km/sec?
An object with a mass of 100 kg measured on Earth is taken to the Mars. What is the mass of the object on the Mars’s surface if the acceleration due to gravity on Mars is two-fifth of that on Earth?
Old hw, trying to review for exam, please show all steps
Consider a spacecraft in an elliptical orbit around the earth. At the low point, it is 500 km from earth's surface, at the high point, it is 3500 km from the earth's surface
Part A: Determine the mass of the massive object at the center of the Milky Way galaxy. Give your answer in kilograms.
M=___kg
Part B: Give your answer in solar masses (one solar mass is the mass of the sun).
M=___ms
Part C: Many astronomers believe that the massive object at the center of the Milky Way galaxy is a black hole. If so, what must the Schwarzschild radius of this black hole be?
Rs=___m
Chapter 24 Solutions
Astronomy
Ch. 24 - How does the equivalence principle lead us to...Ch. 24 - If general relativity offers the best description...Ch. 24 - Einstein’s general theory of relativity made or...Ch. 24 - If a black hole itself emits no radiation, what...Ch. 24 - What characteristics must a binary star have to be...Ch. 24 - A student becomes so excited by the whole idea of...Ch. 24 - What is an event horizon? Does our Sun have an...Ch. 24 - What is a gravitational wave and why was it so...Ch. 24 - What are some strong sources of gravitational...Ch. 24 - Suppose the amount of mass in a black hole...
Ch. 24 - Imagine that you have built a large room around...Ch. 24 - A monkey hanging from a tree branch sees a hunter...Ch. 24 - Why would we not expect to detect X-rays from a...Ch. 24 - Look elsewhere in this book for necessary data,...Ch. 24 - Which is likely to be more common in our Galaxy:...Ch. 24 - If the Sun could suddenly collapse to a black...Ch. 24 - Suppose the people in Figure 24.4 are in an...Ch. 24 - You arrange to meet a friend at 5:00 p.m. on...Ch. 24 - You are standing on a scale in an elevator when...Ch. 24 - Look up G, c, and the mass of the Sun in Appendix...Ch. 24 - Suppose you wanted to know the size of black holes...Ch. 24 - Use the result from Exercise 24.21 to calculate...Ch. 24 - Since the force of gravity a significant distance...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Use the data at the back of this book to determine H for the combustion of a mole of glucose, C6H12O6+6O26CO2+6...
An Introduction to Thermal Physics
(I) A solar cooker, really a concave mirror pointed at the Sun, focuses the Sun’s rays 18.8 cm in front of the ...
Physics for Scientists and Engineers with Modern Physics
22.3 You measure an electric field of 1.25 × 106 N/C at a distance of 0.150 m from a point charge. There is no ...
University Physics with Modern Physics (14th Edition)
16.76 CP Longitudinal Waves on a Spring. A long spring such as a Slinky™ is often used to demonstrate longitudi...
University Physics (14th Edition)
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
The density of hot air in the balloon.
Physics (5th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- You are standing on a scale in an elevator when the cable snaps, sending the elevator car into free fall. Before the automatic brakes stop your fall, you glance at the scale reading. Does the scale show your real weight? An apparent weight? Something else?arrow_forwardA man has a mass of 150 kg. What does he weigh on earth expressed in N? If the gravitation constant on the moon, gm is one-sixth that on the earth, how much does the man in # 7 weigh on the moon? An astronaut on the moon places a package on a scale and finds it weight to be 15 N. What would the package weigh on earth? What is the package's mass on the moon?arrow_forwardPlease answer the equation step by step and include a proper diagram if needed. Usse gravity as 9.8m/s^2. 4. Mars and Earth, at their closest theoretical positions, are 54.6 million km apart. The mass of Earth is 5.97 x 10 kg, and the mass of Mars is 6.39 x 10ª kg. A satellite of mass 9550 kg is to be placed such that the forces of gravity between the satellite and the two planets are equal in magnitude. Determine two possible locations for this to occur.arrow_forward
- Why is Newton's version of Kepler's third law so useful to astronomers? It is the only way to determine the masses of many distant objects. O It tells us how rapidly a planet spins on its axis. O It explains why objects spin faster when they shrink in size. O It tells us that more-distant planets orbit the Sun more rapidly.arrow_forwardPlease answer it within 30 minutes.I will upvote! Suppose it is known that the earth attracts an object with a force that decreases at the rate of 2 N/km when r = 30,000 km. How fast does this force change when r = 15,000 km? I think I'm supposed to use the dF/dr = -2GmM/r3.I've tried this numerous time and I keep getting 8 N/km, which my teacher says is wrong.arrow_forwardWhat would be the acceleration of gravity (in m/s2) at the surface of a world with nine times Earth's mass and five times its radius?arrow_forward
- Newton showed that the periods and distances in Kepler’s third law depend on the masses of the objects. What would be the period of revolution of the Earth (still at 1 AU from the Sun) if the Sun had twice its present mass? What would be the period of revolution of the Earth (still at 1 AU from the Sun) if the Earth had twice its present mass? Give your answers in years.arrow_forwardThe gravity on Jupiter is basically 2.5 times that of Earth's. If a ball has a weight of 13 g on Earth... First, what would be its mass, in g, on Jupiter? Explain your answer.Second, what would be its weight, also in g, on Jupiter? Explain your answer.arrow_forwardhow to solve for Ugrav with a given mass, velocity, height and speed? Given: mass=0.3 kg velocity= 0 height= 0.485 speed=0.25 solve for Ugrav and show solutions.arrow_forward
- B4arrow_forwardIn 2004 astronomers reported the discovery of a large Jupiter-sized planet orbiting very close to the star HD 179949 (hence the term "hot Jupiter"). The orbit was just 1/9 the distance of Mercury from our Sun, and it takes the planet only 3.09 days to make one orbit (assumed to be circular). a. What is the mass of the star? Express your answer in kilograms and as a multiple of our Sun's mass. b. How fast (in km/s) is this planet moving?arrow_forwardOn Jupiter g is 26.0 m/s/s. If you go skydiving on Jupiter (bad idea) and you were to fall for 5.2 seconds, how far would you travel and what would your speed be?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStax
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning
Stars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage Learning
Astronomy
Physics
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:OpenStax
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Foundations of Astronomy (MindTap Course List)
Physics
ISBN:9781337399920
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning
Stars and Galaxies (MindTap Course List)
Physics
ISBN:9781337399944
Author:Michael A. Seeds
Publisher:Cengage Learning
General Relativity: The Curvature of Spacetime; Author: Professor Dave Explains;https://www.youtube.com/watch?v=R7V3koyL7Mc;License: Standard YouTube License, CC-BY