Author Question: How does the force of gravity between galaxies affect the recessional velocity of the galaxies? How ... (Read 53 times)

nevelica · **on:** Jul 28, 2018

How does the force of gravity between galaxies affect the recessional velocity of the galaxies? How would this affect the value of Hubble's constant? The calculated age of the universe? Explain your answers.

Question 2

What happens to the magnitude of the magnetic field inside a long solenoid if the number of turns is doubled, with the length remaining the same?
1.It becomes four times larger.
2.It becomes twice as large.
3.It is unchanged.
4.It becomes one-half as large.
5.It becomes one-fourth as large.

mmpiza · **Reply #1 on:** Jul 28, 2018

Answer to Question 1

The effect of gravitational force on galaxies will decrease the recessional velocity of
the galaxies. Hubble's constant will be smaller because the constant is proportional to
the velocity. This will give an increase in the calculated age of the universe.
Current findings show, however, that this effect may be completely canceled by some unknown, even
stronger repulsion force that appears to be causing the overall expansion rate of the universe to be
accelerated, not slowing down at all.

Answer to Question 2

2