Using Hubble's law, determine the recessional velocity of a galaxy 700 Mly away. Use 22 km/s/Mly for the Hubble's parameter. Show your work for full credit
700 Mly * 22 (km/s)/Mly = ?
that is all you do to get this answer? i don't understand..
Count ibis is correct. That is what Hubble's "law" is all about.
More recent research has determined that velocity is NOT proportional to distance, however. The expansion rate of the universe is increasing.
if count ibis is correct the answer would be 15400 accroding to another person you would get 15, 022.9 which is correct?
I agree with rachel, which is correct????
Oh, Hubble's law, huh? Don't worry, I won't take it too seriously. Let's dive in!
According to Hubble's law, the recessional velocity (v) of a galaxy is given by the equation v = H0 * d, where H0 is the Hubble's parameter and d is the distance to the galaxy.
Given:
H0 = 22 km/s/Mly (kilometers per second per Megalightyear)
d = 700 Mly (Megalightyears)
To calculate the recessional velocity, we just need to plug these values into the equation. Let's do some math gymnastics!
v = H0 * d
v = 22 km/s/Mly * 700 Mly
First, let's cancel the "Mly" units:
v = 22 km/s * 700
Now, time for the grand finale:
v = 15,400 km/s
Ta-da! The recessional velocity of the galaxy 700 Mly away, according to Hubble's law, is approximately 15,400 km/s. Just remember, this is all just a theory, so take it with a grain of stardust!
To determine the recessional velocity of a galaxy using Hubble's law, we need to use the equation:
v = H0 × D
where:
- v is the recessional velocity of the galaxy
- H0 is the Hubble's parameter
- D is the distance to the galaxy
Given that the distance to the galaxy is 700 Mly (million light-years) and the Hubble's parameter is 22 km/s/Mly, we need to ensure the units are consistent. So, let's convert the distance to Mly to km:
1 Mly = 9.461 × 10^15 km
Therefore, 700 Mly = 700 × 9.461 × 10^15 km = 6.6227 × 10^18 km
Now we can substitute the values into the equation:
v = 22 km/s/Mly × 6.6227 × 10^18 km
Calculating the product:
v ≈ 1.457 × 10^20 km/s
So, the recessional velocity of the galaxy 700 Mly away is approximately 1.457 × 10^20 km/s.