1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
abruzzese [7]
3 years ago
9

Recall the raisin cake model of the universe. Our universe is expanding between the galaxies. You measure the recession velocity

of Galaxy A to be 2,000 km/sec and the recession velocity of Galaxy B to be 6,000 km/sec. What can you say about the distances to these galaxies?
Physics
1 answer:
Rina8888 [55]3 years ago
5 0

Explanation:

Recession velocity of a galaxy is related to the distance at which the galaxy is located. This relationship is given by the hubble constant, as follows:

v_r=HD

Hubble constant is aproximate 70\frac{km/s}{Mpc} and 1 megaparsec (Mpc) is 3.26*10^6 light years. Rewriting for D:

D=\frac{v_r}{H}

For galaxy A:

D=\frac{2000\frac{km}{s}}{70\frac{km/s}{Mpc}}\\\\D=28.57Mpc\\\\D=28.57Mpc*\frac{3.26*10^6ly}{1Mpc}=9.31*10^7ly

For galaxy B:

D=\frac{6000\frac{km}{s}}{70\frac{km/s}{Mpc}}\\\\D=85.71Mpc\\\\D=85.71Mpc*\frac{3.26*10^6ly}{1Mpc}=2.79*10^8ly

You might be interested in
WORTH 10 POINTS! I WILL GIVE BRAINLIEST!
Sav [38]

Answer:

The Sun’s magnetic field, solar winds and the Earth's magnetic tail are responsible for making the aurora lights in the north and south poles look different, say international scientists. Researching the interactions of these phenomena have debunked previous theories around why the lights can have different shapes and can occur in different locations. This research also helps scientists to better understand the interactions between the sun and earth, which could help with predicting space weather.

<h2>hope it helps!</h2>

5 0
3 years ago
Read 2 more answers
Which atomic model is missing from this set?
kap26 [50]

Answer:

what are your options

Explanation:

6 0
4 years ago
How are land-use laws in the United States different from the land-use laws inherited from England?
7nadin3 [17]
Private property owners must allow for public access and use.
4 0
3 years ago
The Starship Enterprise is caught in a time warp and Spock is forced to use the primitive techniques of the 20th century to dete
Goryan [66]

Answer:c=0.213 J/g/K  

Explanation:

Given

sample mass(m_s)=120 gm

initial temperature of mineral(T_{im})=92.6

mass of water(m_w)=82.9

Water initial temperature(T_{iw})=20

Heat capacity of calorimeter =15.3 J/k

Final Temperature is 24.8

let c be the specific heat of mineral

Heat released by mineral sample=heat absorbed by calorimeter and water

120\times c\times (92.6-24.8)=82.9\times 4.184\times (24.8-20)+15.3\times (24.8-20)

c\times 67.8=14.486

c=0.213 J/g/K

3 0
3 years ago
all of the following methods are ways to correct a run-on sentence except ,placing a semicolon between the compete sentences.put
olchik [2.2K]
All of the following methods are ways to correct a run-on sentence except: Putting a comma in between the complete sentences. 

One of the uses of semi-colon is to separate two complete or independent sentences. A conjunction can also be used such as: and, however and but, to connect two complete sentences and transform them into a compound sentence.
6 0
3 years ago
Other questions:
  • T or F science is a continually evolving discipline
    15·2 answers
  • If two different substances, with the same mass (1 gram) absorb the same amount of energy, which of the following can
    5·1 answer
  • A pendulum is swinging back and forth with a period of 2.0 seconds here on Earth. This pendulum is then brought to the Moon, whe
    14·1 answer
  • Facts about Tsunami?
    9·1 answer
  • Which statements describe Rutherford model of the atom
    14·2 answers
  • Astronomers beleive that there is no planet in the asteroid belt region because
    13·1 answer
  • Which phrase best describes a bird's skeleton​
    6·2 answers
  • PLZ HELP!!! BRAINLYEST WILL BE GIVEN TO BEST ANSWER!!!! IF YOU PUT A LINK I WILL REPORT YOU!!!!! DONT TRY ME!!!!!! YALL BEEN WAS
    15·1 answer
  • What is the average distance that a comet orbits the sun if its period of revolution is 7.90 years
    14·1 answer
  • #36 , what is this answer?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!