Essential University Physics
4th Edition
ISBN: 9780134988566
Author: Wolfson, Richard
Publisher: Pearson Education,
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Chapter 39, Problem 25E
To determine
The distance to a galaxy whose redshift reveals that it’s receding from us at
2.5 × 10 4 km/s
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Chapter 39 Solutions
Essential University Physics
Ch. 39 - Prob. 1FTDCh. 39 - Prob. 2FTDCh. 39 - Prob. 3FTDCh. 39 - Prob. 4FTDCh. 39 - Name the fundamental force involved in (a) binding...Ch. 39 - Prob. 6FTDCh. 39 - Prob. 7FTDCh. 39 - Prob. 8FTDCh. 39 - Describe the origin of the cosmic microwave...Ch. 39 - The radiation that we observe as the cosmic...
Ch. 39 - Prob. 11ECh. 39 - Prob. 12ECh. 39 - Prob. 13ECh. 39 - Prob. 14ECh. 39 - Prob. 15ECh. 39 - Prob. 16ECh. 39 - Prob. 17ECh. 39 - Prob. 18ECh. 39 - Prob. 19ECh. 39 - Prob. 20ECh. 39 - Prob. 21ECh. 39 - Prob. 22ECh. 39 - Prob. 23ECh. 39 - Prob. 24ECh. 39 - Prob. 25ECh. 39 - Prob. 26ECh. 39 - Prob. 27ECh. 39 - Prob. 28ECh. 39 - Prob. 29ECh. 39 - Prob. 30ECh. 39 - Prob. 31ECh. 39 - Prob. 32ECh. 39 - Prob. 33ECh. 39 - Prob. 34ECh. 39 - Prob. 35PCh. 39 - Prob. 36PCh. 39 - Prob. 37PCh. 39 - Prob. 38PCh. 39 - Prob. 39PCh. 39 - Prob. 40PCh. 39 - Prob. 41PCh. 39 - Prob. 42PCh. 39 - Prob. 44PCh. 39 - Prob. 45PCh. 39 - Prob. 46PCh. 39 - Prob. 47PCh. 39 - Prob. 48PCh. 39 - Prob. 49PCh. 39 - Prob. 50PCh. 39 - Prob. 51PCh. 39 - Prob. 52PCh. 39 - Prob. 53PPCh. 39 - Prob. 54PPCh. 39 - Prob. 55PPCh. 39 - Prob. 56PP
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- Why can we not determine distances to galaxies by the same method used to measure the parallaxes of stars?arrow_forwardWhen comparing two isolated spiral galaxies that have the same apparent brightness, but rotate at different rates, what can you say about their relative luminosity?arrow_forwardIf the Hα absorption line in the spectrum of a galaxy is observed at a wavelength of 6715 ˚A, at what speed is the galaxy moving away from us?arrow_forward
- Find the distance to a galaxy whose redshift reveals that it's re- ceding from us at 2.5×104 km/s.arrow_forwardThe Blue hydrogen line has a frequency of 6.90 x 1014 Hz. What will be the observed wavelength of the blue line of a galaxy that is moving away from Earth at 0.4c?arrow_forwardOne of the largest observed redshifts for a galaxy is 8.6 from the galaxy UDFy-38135539. How fast is the galaxy moving with respect to us? How far away is it?arrow_forward
- The Hubble Law, equation (D), can be used to determine the age of the universe. Using your average valueof H, calculate the recessional velocity of a galaxy of a galaxy which is 800 Mpc away.Velocity of a galaxy 800 Mpc away: _______________________________km/secarrow_forwardA certain galaxy is observed to be receding from the Sun at a rate of 8000 km/sec. The distance to this Galaxy is measured independently and found to be 1.4 x 10 to the eighth power pc. Using this data, what is the value of the Hubble constant ?arrow_forwardGalaxy NGC 2342 has a velocity of 5,690 km/s and is at a distance of 74 Mpc away. What is the value of the Hubble constant based upon these values? Galaxy NGC 4442 is 120 Mpc away. If the Hubble Constant is 68 km/s/Mpc, how fast should NGC 4442 be moving due to the expansion of the Universe?arrow_forward
- A galaxy is observed to be at 10.0 Mpc from Earth. If it is receding at 520 km/s, calculate the Hubble's constant.arrow_forwardIf a galaxy has a redshift of 0.35 and the hydrogen line has a wavelength of 486.3 nm, what will be the wavelength coming out of the galaxy as seen from Earth?arrow_forwardThe bright radio galaxy, 3c84, is observed to be moving away from the Earth at such high speed that the emitted blue 434-nm Hγ line of hydrogen is Doppler-shifted to 442 nm. (a) How fast is the radio galaxy receding? _______ carrow_forward
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