Astronomy
General Astronomy
Universe
The Future of the Universe

How had our view of the universe changed from the beginning of mankind?
What major factor determines the future of the Universe? Why?
What do you think that future will be?
Be specific and include references to support your answer.

Solution Preview

Astronomy
General Astronomy
Universe
...

Solution Summary

This solution is comprised of a detailed explanation of The Future of the Universe.
It contains step-by-step explanation for the following problem:

How had our view of the universe changed from the beginning of mankind?
What major factor determines the future of the Universe? Why?
What do you think that future will be?
Be specific and include references to support your answer.

(4.2) Consider Einstein's static universe, in which the attractive force of the matter density p is exactly balanced by the repulsive force of the cosmological constant, Λ=4piGp. Suppose that some of the matter is converted into radiation (by stars, for instance). Will theuniverse start to expand or contract? Explain your answ

1.We have heard of simple toy models of theUniverse that were studied by Einstein, de Sitter, and Friedman. If our Universe was 100,000 times denser than it actually is, what fate would the toy-model predict, a Big Crunch, Eternal Expansion, or a Big Rip? Why?
2. In the question above, would theuniverse have a finite size

Assume theuniverse today is flat with both matter and a cosmological constant but no radiation.
a) Compute the horizon of theUniverse as a function of Ohm_M and sketch it. (You will need a computer or calculator to do this.)
b) What is the current horizon size for a universe with Ohm_M = 1/3 and h =1/sqrt(2)?
c) What is

A future experiment finds that the angular diameter distance to the CMB is .1% larger than it would be in a flat universe. Assume a Universe with only matter (and curvature) with a redshift to the CMB of z=1000.
a. Is theUniverse positively or negatively curved?
b. What is 1 - omega(0)
See attached file for additional inf

5.9 Two equal quantities of water, of mass m and at temperatures T1, and T2, are adiabatically mixed together, the pressure remaining constant. Show that the entropy change of the universe is
[see the attachment for the equation]
where c_p, is the specific heat of water at constant pressure. Show that [delta]S >= 0. (Hint: (a

Using the physical conditions present in theuniverse during the era of recombination (T=3000 and pm=10^-18 kg/m^3), show by calculation that the Jeans length for theuniverse at that time was about 100 ly and that the total mass contained in a sphere with this diameter was about 4x10^5 Msun.

The expansion of theUniverse is described by Friedmann's equation,
(R/R)^2 = 8piGp/3 - (kc^2)/(R^2) + lambda/3,
where R is the characteristic scale of theUniverse, R is its derivative with respect to time, p is the mass density of theUniverse, k is a constant which can have values of -1, -, + 1 and lambda is Einstein's

Expansion of theUniverse and Big Bang Theory
1) Does the fact that the entire galaxy was involved in bringing forth life on Earth change your perspective of Earth or life in any way? Explain. (Take the stance that my belief in extra terrestrial life in theuniverse is increased.)
2)