College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 26, Problem 55P
To determine
The effect on the estimation of the age of universe, if the expansion of universe does not take place at a constant rate but at an accelerated rate.
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Check out a sample textbook solutionChapter 26 Solutions
College Physics
Ch. 26 - Review Question 26.1 Why is the historical role of...Ch. 26 - Review Question 26.2 Alice is standing on the...Ch. 26 - Review Question 26.3 You hear in your physics...Ch. 26 - Review Question 26.4 You are on a train eating an...Ch. 26 - Prob. 5RQCh. 26 - Prob. 6RQCh. 26 - Prob. 7RQCh. 26 - Review Question 26.8 Why must the classical...Ch. 26 - Prob. 9RQCh. 26 - Prob. 10RQ
Ch. 26 - Prob. 11RQCh. 26 - Prob. 12RQCh. 26 - Prob. 1MCQCh. 26 - Multiple Choice Questions
2. On what did Michelson...Ch. 26 - Multiple Choice Questions Physicists explained the...Ch. 26 - Multiple Choice Questions
4. What is a proper time...Ch. 26 - Prob. 5MCQCh. 26 - Prob. 6MCQCh. 26 - Prob. 7MCQCh. 26 - Prob. 8MCQCh. 26 - Multiple Choice Questions
9. The measurement of...Ch. 26 - Prob. 10MCQCh. 26 - Prob. 11MCQCh. 26 - Multiple Choice Questions Which of the blue world...Ch. 26 - What is an inertial reference frame? How can you...Ch. 26 - 14. Give an example of a phenomenon that an...Ch. 26 - 15. Explain the difference between a proper...Ch. 26 - Prob. 16CQCh. 26 - What does it mean to say that the speed of...Ch. 26 - You move toward a star at a speed of 0.99c. At...Ch. 26 - 19. You pass Earth in a spaceship that moves at...Ch. 26 - It takes light approximately 1010 years to reach...Ch. 26 - Prob. 21CQCh. 26 - Name several ways in which your life would be...Ch. 26 - Prob. 23CQCh. 26 - The classical equation for calculating kinetic...Ch. 26 - How did the Doppler effect for light help...Ch. 26 - Prob. 26CQCh. 26 - Prob. 27CQCh. 26 - Prob. 1PCh. 26 - Prob. 2PCh. 26 - Prob. 3PCh. 26 - Prob. 4PCh. 26 - Prob. 5PCh. 26 - Prob. 6PCh. 26 - Prob. 7PCh. 26 - Prob. 8PCh. 26 - Prob. 9PCh. 26 - Prob. 10PCh. 26 - 26.3-26.6 Simultaneity, Time Dilation, Length...Ch. 26 - Prob. 12PCh. 26 - Prob. 13PCh. 26 - 26.3-26.6 Simultaneity, Time Dilation, Length...Ch. 26 - 26.3-26.6 Simultaneity, Time Dilation, Length...Ch. 26 - 26.3-26.6 Simultaneity, Time Dilation, Length...Ch. 26 - Prob. 17PCh. 26 - 26.3-26.6 Simultaneity, Time Dilation, Length...Ch. 26 - 26.3–26.6 Simultaneity, Time Dilation, Length...Ch. 26 - Prob. 20PCh. 26 - Prob. 21PCh. 26 - 26.3-26.6 Simultaneity, Time Dilation, Length...Ch. 26 - Prob. 23PCh. 26 - Prob. 26PCh. 26 - Prob. 27PCh. 26 - Prob. 28PCh. 26 - Prob. 30PCh. 26 - Prob. 31PCh. 26 - Prob. 32PCh. 26 - 26.9 Relativistic Energy
33. Determine the ratio...Ch. 26 - Prob. 34PCh. 26 - 26.9 Relativistic Energy * At what speed must an...Ch. 26 - Prob. 36PCh. 26 - Prob. 37PCh. 26 - Prob. 38PCh. 26 - Prob. 39PCh. 26 - Prob. 40PCh. 26 - Relativistic Energy * A particle originally moving...Ch. 26 - Prob. 42PCh. 26 - 26.9 Relativistic Energy
43. ** A particle of mass...Ch. 26 - Prob. 44PCh. 26 - Relativistic Energy * Mass equivalent of energy to...Ch. 26 - Prob. 46PCh. 26 - Prob. 47PCh. 26 - Prob. 48PCh. 26 - Prob. 49PCh. 26 - Relativistic Energy 109kg of mass to energy (b)...Ch. 26 - 26.10 Doppler Effect for EM Waves
52. Why no color...Ch. 26 - Prob. 53PCh. 26 - Prob. 54PCh. 26 - Prob. 55PCh. 26 - Prob. 56PCh. 26 - Prob. 57PCh. 26 - 58.* Boat trip A boat's speed is 10 m/s. It makes...Ch. 26 - * Space travel An explorer travels at speed...Ch. 26 - ** A pilot and his spaceship of rest mass 1000 kg...Ch. 26 - * Alice's friends Bob and Charlie are having a...Ch. 26 - Prob. 65GPCh. 26 - 66. ** Space travel A pilot and her spaceship have...Ch. 26 - Prob. 67GPCh. 26 - Prob. 68GPCh. 26 - Prob. 69RPPCh. 26 - Prob. 70RPPCh. 26 - Prob. 71RPPCh. 26 - Prob. 72RPPCh. 26 - Prob. 73RPPCh. 26 - Prob. 74RPPCh. 26 - Prob. 75RPPCh. 26 - Prob. 76RPPCh. 26 - Prob. 77RPPCh. 26 - Prob. 78RPPCh. 26 - Prob. 79RPPCh. 26 - Prob. 80RPP
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- (a) Calculate the approximate age of the universe from the average value of the Hubble constant, H0=20km/s . Mly. To do this, calculate the time it would take to travel 0.307 Mpc at a constant expansion rate of 20 km/s. (b) If somehow acceleration occurs, would the actual age of the universe be greater or less than that found here? Explain.arrow_forwardNear the center of our galaxy, hydrogen gas is moving directly away from us in its orbit about a black hole. We receive 19(N) nm electromagnetic radiation and know that it was 1875 nm when emitted by the hydrogen gas. What is the speed of the gas?arrow_forwardA light source recedes from an observer with a speed s that is small compared with c. (a) Show that the fractional shift in the measured wavelength is given by the approximate expression =vSc This phenomenon is known as the redshift because the visible light is shifted toward the red. (b) Spectroscopic measurements of light at = 397 nm coming from a galaxy in Ursa Major reveal a redshift of 20.0 nm. What is the recessional speed of the galaxy?arrow_forward
- Distances to local galaxies are determined by measuring the brightness of stars, called Cepheid variables, that can be observed individually and that have absolute brightnesses at a standard distance that are well known. Explain how the measured brightness would vary with distance, as compared with the absolute brightness.arrow_forward(a) What Hubble constant corresponds to an approximate age of the universe of 1010 y? To get an approximate value, assume the expansion rate is constant and calculate the speed at which two galaxies must move apart to be separated by 1 Mly (present average galactic separation) in a time of 1010 y. (b) Similarly, what Hubble constant corresponds to a universe approximately 21010years old?arrow_forwardGalaxies are found in the “walls” of huge voids; very few galaxies are found in the voids themselves. The text says that the structure of filaments and voids has been present in the universe since shortly after the expansion began 13.8 billion years ago. In science, we always have to check to see whether some conclusion is contradicted by any other information we have. In this case, we can ask whether the voids would have filled up with galaxies in roughly 14 billion years. Observations show that in addition to the motion associated with the expansion of the universe, the galaxies in the walls of the voids are moving in random directions at typical speeds of 300 km/s. At least some of them will be moving into the voids. How far into the void will a galaxy move in 14 billion years? Is it a reasonable hypothesis that the voids have existed for 14 billion years?arrow_forward
- Figure P38.21 shows a jet of material (at the upper right) being ejected by galaxy M87 (at the lower left). Such jets are believed to be evidence of supermassive black holes at the center of a galaxy. Suppose two jets of material from the center of a galaxy are ejected in opposite directions. Both jets move at 0.750c relative to the galaxy center. Determine the speed of one jet relative to the other. Figure P 38.21arrow_forwardConstruct Your Own Problem Consider a supermassive black hole near the center of a galaxy. Calculate the radius of such an object based on its mass. You must consider how much mass is reasonable for these large objects, and which is now nearly directly observed. (Information on black holes posted on the Web by NASA and other agencies is reliable, for example.)arrow_forwardImagine an astronaut on a trip to Sirius, which lies 8 light-years from Earth. Upon arrival at Sirius, the astronaut finds that the trip lasted 6 years. If the trip was made at a constant speed of 0.8c, how can the 8-light-year distance be reconciled with the 6-year duration?arrow_forward
- If astronauts could travel at v = 0.950c, we on Earth would say it takes (4.20/0.950) = 4.42 years to reach Alpha Centauri, 4.20 light-years away. The astronauts disagree. (a) How much time passes on the astronauts clocks? (b) What is the distance to Alpha Centauri as measured by the astronauts?arrow_forwardIf the current position and velocity of every particle in the Universe were known, together with the laws describing the forces that particles exert on one another, the whole future of the Universe could he calculated. The future is determinate and preordained. Free will is an illusion. Do you agree with this thesis? Argue for or against it.arrow_forwardDistances to very remote galaxies are estimated based on their apparent type, which indicate the number of stars in the galaxy, and their measured brightness. Explain how the measured brightness would vary with distance. Would there be any correction necessary to compensate for the red shift of the galaxy (all distant galaxies have signi?cant ted shifts)? Discuss possible causes of uncertainties in these measurements.arrow_forward
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