State the problems of the Hot Big Bang model in cosmology, and briefly explain how inflation solves these problems
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A: String theory attempt to unify Quantum mechanics and general relativity
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Q: State the three problems of the Hot Big Bang model in cosmology, and briefly explain how inflation…
A: The three main problems of the Hot Big Bang model in cosmology are the horizon problem, the flatness…
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A: Required : True or False
State the problems of the Hot Big Bang model in cosmology, and briefly explain how inflation solves these problems.
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- The discovery of the dark energy was a surprise because astrophysicists generally assumed that the expansion would be slowing down. Select one: True FalseWith the aid of a diagram, explain the physical origin of cosmological redshift in an expanding universe, and how this differs from the Doppler shift due to relative motion. Observations of distantgalaxies indicate that their recession velocities, v, and their distances, d, follow a Hubble Law:v = H0d, where H0 is a constant. Using the analogy of an expanding grid or ruler, demonstratethat Hubble’s Law indicates that the Universe is undergoing uniform expansion.How does string theory propose to reconcile general relativity and quantum mechanics, and what implications does it have for our understanding of the fundamental nature of space - time?
- What is the CMB? Group of answer choices A dense region of 4.5 million stars. A large star of 4.5 million solar masses. The cosmic microwave background of photons left over and cooled down from when the universe became transparent 300,000 years after the Big Bang. The space curvature of the universeWhy is dark energy required to explain the universe as we see it today according to the Big Bang model of the universe? 9To what does cold refer to the term "cold dark matter"? Why do models of large-scale structure agree best with the dark matter being "cold"?
- If you observe light emitted from a distance object when the cosmic background temperature was Tz=54K, what is the redshift z of that light? At that redshift, what was the diameter Dz of the universe at that time compared to the diameter of today's universe D0?In Chapter 7 we discussed the need for the addition of the cosmological constant A to the Einstein Field Equations and further to our derived equations. iii. Starting with the fluid equation, show that the pressure exerted due to the cosmological constant is PA = -Pac? (Recall that we define an energy density due to the cosmological constant as the following scaled parameter PA = THIS IS A COSMOLOGY QUESTION!!!!!!!!