UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 25, Problem 17Q
To determine
The reason due to which astronmers conisder the Hubble constant as the “Hubble variable”.
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why is it difficult to measure the Hubble constant?
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Explain how the Hubble constant, H0, can be used to make an estimate for the age of the Universe. Use the value of H0 = 0.07×103 kms-1/Mpc to estimate the Universe’s age. Comment on the significance of your answer.
Chapter 25 Solutions
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
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- There is still some uncertainty in the Hubble constant. Current estimates range from about 19.9 km/s per million light years to 23 km/s per million light-years. Assume that the Hubble constant has been constant since the Big Bang.arrow_forwardSketch a caricature or diagram of the situation or phenomenon showing that Hubble’s Law strongly implies an expanding universe. And provide an explanation.arrow_forwardWhat is the redshift z of a galaxy 172 Mpc away from us? Note: Assume a value of the Hubble constant of 71.1 km/s/Mpc Round your answer to three decimal places.arrow_forward
- Estimate the age of the universe for a Hubble constant of (a)50km/s/Mpc, (b) 75km/s/Mpc, and (c) 100 km/s/Mpc. On the basis of the answers, explain how the ages of globular clusters could be used to put a limit on the maximum value of the Hubble constant.arrow_forwardExplain how and why Hubble’s observations showed that the universe is expanding?arrow_forwardIf Hubble’s law can be extrapolated to very large distances, at what distance would the apparent recessional speed become equal to the speed of light?arrow_forward
- Imagine that an observed distant galaxy is measured to have a distance of 40 Mpc by a Type Ia supernovae and the redshift of the galaxy indicates the galaxy appears to be moving away from us at a speed of 2400 km/s. What would the Hubble constant be if measured solely based on this galaxy in units of km/s/Mpc?arrow_forwardIf a quasar has a recessional velocity of 2.7 × 10 5 km/sec and is determined to be 3600 Mpc, what is the Hubble constant based on this quasar alone? a. 50 km/sec/Mpc b. 9.7 × 108 km/sec/Mpc c. 75 km/sec/Mpc d. 0.013 km/sec/Mpc e. 273,600 km/sec/Mpcarrow_forwardState And Explain Hubbles Law?arrow_forward
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