Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 21, Problem 31Q
To determine
The reason of
The circumstances in which the Newton’s description about gravitation is adequate.
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Chapter 21 Solutions
Universe: Stars And Galaxies
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- Which of the following statements are fundamental postulates of the special theory of relativity? More than one statement may be correct. (a) Light moves through a substance called the ether. (b) The speed of light depends on the inertial reference frame in which it is measured. (c) The laws of physics depend on the inertial reference frame in which they are used. (d) The laws of physics are the same in all inertial reference frames. (e) The speed of light is independent of the inertial reference frame in which it is measured.arrow_forwardWhich of the following statements are fundamental postulates of the special theory of relativity? More than one statement may be correct. (a) Light moves through a substance called the ether. (b) The speed of light depends on the inertial reference frame in which it is measured. (c) The laws of physics depend on the inertial reference frame in which they are used. (d) The laws of physics are the same in all inertial reference frames. (e) The speed of light is independent of the inertial reference frame in which it is measured.arrow_forwardDo binary stars (double-star systems that orbit about a common center of mass) radiate gravitational waves? Why or why not?arrow_forward
- Why do scientists consider Einstein's General Theory of Relativity to be a better theory of gravity than Newton's theory of gravity? a) Newton's theory was never useful, so it had to be replaced by something. b) The two theories always make very different predictions, and only Einstein's theory works. c) Einstein's gravity makes correct predictions in a few cases where Newton's theory does not. d) Einstein's theory is newer, and scientists always prefer newer theories.arrow_forwardConsider a universe where G = 1 N m2/kg2. Now consider an equilateral triangle of side length 3 m. At two corners of the triangle are equal masses of size 63 kg. Calculate the magnitude of the gravitational field at the third corner, in N/kg. (Please answer to the fourth decimal place - i.e 14.3225)arrow_forwardIn the context of relativity, what is an "event"? Give a specific example of an event and provide the coordinates necessary to specify the event.arrow_forward
- What are the two postulates of the special theory of relativity?arrow_forwardYou take a round trip to the star Sirius, a distance of 8.6 light years away, on board a spacecraft traveling at 99% the speed of light. When you return to Earth, 17.2 years have elapsed on Earth. But due to Einstein's theory of relativity, you will have aged by 172 years 24 years 2.4 years 17.2 years The fastest space probe currently flying (perhaps one of the Voyagers) might be able to reach a nearby star system in about 50,000 years 5,000 years 50 years 500 years Elon Musk of Space-X plans to send a human crew to the nearby Proxima Centauri star system by 2050. True Falsearrow_forwardWhich of Einstein’s postulates of special relativity includes a concept that does not fit with the ideas of classical physics?Explain.arrow_forward
- I am trying to calculate the gravitational mass (in solar masses) I have the formula M= V^2 R / G (4.31 x 10^-6) The paperwork says our numbers should be big but I am coming up with .002 etc. What am I doing wrong?arrow_forwardIn general relativity, gravity changes time. Gravitational potential = - G M / R. Time change r = At/t = A/c². A satellite (e.g., GPS) orbits 21 km above Earth surface, and gravity at the satellites are a little different from Earth surface. The distance error is Ad = c At. Ad is km in one day Please do not copy and paste. Thank you!arrow_forwardWhy are gravitational waves hard to detect and is there a way to simplify the process? How?arrow_forward
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