Concept explainers
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.
Want to see the full answer?
Check out a sample textbook solutionChapter 24 Solutions
Astronomy
Additional Science Textbook Solutions
An Introduction to Thermal Physics
Physics for Scientists and Engineers with Modern Physics
University Physics with Modern Physics (14th Edition)
University Physics (14th Edition)
The Cosmic Perspective (8th Edition)
Physics (5th Edition)
- If you use an Earth based telescope to project a laser beam onto the moon, you can move the spot across the moon's surface at a velocity greater than the speed of light Does this violate modern relativity? (Note that light is being sent from the Earth to the moon, not across the surface of the moon.)arrow_forwardWhich of the following is a CORRECT description of Einstein’s Geometric Theory of Relativity? A. This theory supported Isaac Newton’s description of gravity as a spontaneous force of attraction between two objects with mass. B. This theory implies that the gravitational force of attraction between two objects with mass does not come from gravity itself. C. This theory describes that space and time are eleven-dimensional where each dimension has distinct characteristics and features. D. This theory has two postulates similar to the Special Theory of Relativity that the laws of physics and speed of light are invariant.arrow_forwardConsider the light of multiple candle flames, each of the same brightness. Rank from brightest to dimmest the light that enters your eye for the following situations. a. 3 candles seen from a distance of 3 m. b. 2 candles seen from a distance of 2 m. c. 1 candle seen from a distance of 1 m.arrow_forward
- Choose the BEST answer to the following: According to the correspondence principle, (a) new theory must agree with old theory where they overlap. (b) Newton’s mechanics is as valid as Einstein’s mechanics. (c) relativity equations apply to high speeds while Newton’s equations apply to low speeds. (d) special relativity and general relativity are two sides of the same coin.arrow_forwardExplain Variable Gravitational Acceleration ?arrow_forwardA space probe with a diameter of 2.50m is moving past Saturn's moon Enceladus. An observational platform on Enceladus measures the shortest length of the ellipsoidal probe to be 1.25m. How fast is the probe moving relative to the moon? a) .999c b) .995c c) .957c d) .883c e) .866carrow_forward
- A monkey hanging from a tree branch sees a hunter aiming a rifle directly at him. The monkey then sees a flash and knows that the rifle has been fired. Reacting quickly, the monkey lets go of the branch and drops so that the bullet can pass harmlessly over his head. Does this act save the monkey’s life? Why or why not? (Hint: Consider the similarities between this situation and that of Exercise 24.11.)arrow_forwardIf you were moving with a constant velocity in deep space, how far would you travel?arrow_forwardObj 4.06 - Explain orbits using Newton’s Laws. Obj 4.07 - Explain orbits using Einstein’s theory of General Relativity. The Indian Space Research Organisation (IRSO) recently launched Brazil’s Amazonia-1 satellite into orbit around Earth. The purpose of Amazonia-1 is to orbit geosynchronously over the Amazon rainforest to monitor and study the effects of deforestation on the climate. Explain how IRSO was able to get Amazonia-1 to orbit Earth using the language of Newton’s Laws. Explain how IRSO was able to get Amazonia-1 to orbit Earth using the language of Einstein’s Theory of General Relativity.arrow_forward
- Thor stands on the top of Stark Tower (425 m) and fights his brother Loki using Mjolnir, his hammer. If his hammer has a mass equal to 300 billion elephants (call it 4.5*1015 kg), what is the gravitation potential energy (in J) of Mjolnir, relative to the ground? (Use scientific notation to enter your answer: 1.23E12 means 1.23 * 1012)arrow_forwardUse the infographic below to determine the gravitational force of the earth and the following two space telescopes. a) Determine the gravitational force between the earth and James Webb telescope when it is on station 1.5 million km (1.5 x 10^9 m) from earth. b). Determine the gravitational force between the earth and the Hubble telescope when it is on station 540 km (5.4 x 10^5 m) from earth. Use the mass of the earth m(earth) = 6 x 10^24 kg. *arrow_forwardChoose the BEST answer to the following: According to general relativity, (a) mass distorts spacetime. (b) gravity affects clocks. (c) light can’t escape from a black hole. (d) All of these.arrow_forward
- AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStaxPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningUniversity Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax
- An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage Learning