Recall that Hubble's law is written v = H0d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubble's constant. Suppose H0 = 22 km/s/million light-years. How fast would a galaxy 1000 million light-years away be receding from us?
A) 22 km/s
B) 22 million light-years/s
C) 22,000 km/s
D) 1000/22 km/s
E) 0.22 times the speed of light
C) 22,000 km/s
You might also like to view...
Which diagram(s) represent(s) a latitude at which the Sun sometimes passes directly overhead?
What will be an ideal response?
On an H-R diagram, stellar masses ________
A) decrease from upper left to lower right B) are impossible to determine C) are greatest in the lower left and least in the upper right D) can be determined for main sequence stars but not for other types of stars
The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1. How much brighter does the Sun appear than Sirius?
What will be an ideal response?
Short-period comets, such as Halley's comet, are believed to come from ______________
a. the Kuiper Belt b. the Oort cloud c. the asteroid belt d. Earth