Graph 2 30,000 20,000 10,000 30,000 Graph1 e 20,000, 10,000 / 500 1000 1500 500

Question

Graph 2 30,000 20,000 10,000 30,000 Graph1 e 20,000, 10,000 / 500 1000 1500 500 1000 1500 Distance (Mpc) Distance (Mpc) Graph 3 Graph 4 30,000 20,000 10,000 30,000 20,000 10,000F 500 1000 1500 500 1000 1500 Distance (Mpc) Distance (Mpc) 7. [3pt| Shown above are graphs of galaxy radial velocity vs. distance. Each show a different possible relation for Hubble's c Law. Rank the graphs based on their predictions of the speed, from slowest to fastest, of a galaxy located 500 Mpc from Earth. D A) Graph:3 B) Graph4 C) Graph 1 D) Graph2

Explanation / Answer

according to the Hubble's law

v=Hd

where, v = velocity

H = Hubble's constant

d = diatance

if we see graph number 1 we can see the straight line having maximum slope among given four graphs, so if we fix distace say 500 Mpc then draw a vertical line from 500 Mpc, and where that line meet with the given graph corresponding value will be velocity.

in simple language if we are fixing distance then velocity is only depending on H i.e, Hubble's constant. The slope represent hubble's constant so maximum value of slope give maximum velocity.

order of slope

graph1 > graph 4 > graph 2 >graph 3

hence order og velocity

graph1 > graph 4 > graph 2 >graph 3

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