Explain why the temperature of the cosmic background radiation is 2.725 K, and how this temperature evolves over time.
Q: The cosmic microwave background consists of: huge clouds of dark matter interspersed with equally…
A: Cosmic microwave background also known relic radiation. Cosmic microwave background is kind of…
Q: I'm having trouble understanding this. Suppose we have a spaceship about the size of a typical…
A: The mass of the ship is M = 130 million kilograms = 1.3×108 kg The required velocity is 12 % of the…
Q: What are the three important pieces of evidence that led scientists to accept the Big Bang as the…
A: The Big Bang model is one of the many theories that were developed to explain the birth of the…
Q: What is the difference between hot dark matter and cold dark matter? What difference does that make…
A: Dark matter is a mysterious substance that makes up almost 85% of the universe's total mass. It…
Q: What major factor determines the future of the universe? Why?
A: Earlier cosmologist believed that due to gravity of supermassive black holes and many other massive…
Q: What are the possible fates for the universe? What do they depend on? What appears to be the actual…
A: In cosmology, the possible fates of the universe are broadly categorized into several scenarios…
Q: Calculate the critical density of our universe.
A: Our universe is expanding and critical density is defined as the average density of matter that is…
Q: What is the evidence that the universe was very uniform during its first 400,000 years?
A: The universe was formed from a big explosion called Big Bang. In the beginning, everything was…
Q: I'm doing a debate about Kalam cosmological. I need to have an example of something out of nothing…
A: Answer:- Atomic physics, Nuclear Physics, Relativistic Physics , Quantum physics, Thermodynamic and…
Q: What if the Andromeda galaxy were to disappear How long before we would notice?
A: About 2.5 million light-years separate our solar system from the Andromeda galaxy. If it vanished,…
Q: According to the cosmological principle, our place in the universe does not appear to be…
A: According to the cosmological principle, our place in the universe does not appear to be…
Q: What causes cosmic microwave background energy?
A: The cosmic microwave background (CMB) is believed to be the leftover radiation from the Big Bang. As…
Q: The present number density of electrons in the Universe is the same as that of protons, about 0.2…
A: The present number density of electrons = 0.2m-3. Long before the formation of microwave background,…
Q: Considering the reactions in primordial nucleosynthesis only, what would be the impact on the…
A: So the lifetime of neutrons is very crucial in shaping the universe as it is now. Even a slight…
Q: Where did all the antimatter go?
A: Anti-particle came into light in the 20th century when famous physicist Paul Dirac was trying to…
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…
Q: What is the estimated age of the Universe (in years) if the Hubble constant is 70 km/s/Mpc?
A:
Q: According to the Big Bang Theory, order from earliest to latest, the sequence of events that are…
A: Before the Big bang all the forces were united. During the first fraction of a second, the forces…
Q: What is the evidence that the universe was very uniform during its first 400,000 years?
A: The evidence of the uniform nature is explained by particle physics. Before the formation of the…
Q: What was the lowest temperature for photons to be able to produce 0 particles in the early universe?…
A: Given: kT=mc2
Q: As you hurtle across the Universe at the speed of light you turn on a flashlight and point it in…
A: Here comes the relativistic concept of speed/ velocity.
Q: Assume a flat Friedmann-Robertson-Walker universe. Calculate the redshift z at which the temperature…
A:
Q: The Analysis of the Big Bang Theory.
A: Universe is the whole yonder which consists of many many miles of life both living and unliving. Its…
Q: The cosmic microwave background radiation is strong evidence for the Big Bang theory because it: (a)…
A: The objective of the question is to understand why the cosmic microwave background radiation (CMBR)…
Q: Why do we think that nothing, other than light, can travel faster than the speed of light?
A: According to the Einstein’s theory of relativity nothing can travel faster than light.
Q: Describe the Big Bang theory. What evidence supports this theory, and what are its implications for…
A: The Big Bang theory is the leading cosmological model that explains the origin and evolution of the…
Q: Explain the Higher-Order Systems?
A:
Q: Where did the atoms that were the cause of the big bang originate from?
A: As the universe cooled, conditions became just right to give rise to the building blocks of matter –…
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- Does Hubble's Law work well for galaxies in the Local Group (such as Andromeda)? No, because dark energy is accelerating the universe's expansion over those distances. No, because we do not know the precise value of Ho. No, because Hubble did not know the Local Group existed when he discovered his law. Yes, it works well for all galaxies. No, because galaxies in the Local Group are bound gravitationally together.According to the standard Big Bang theory (neglecting any effects of cosmic acceleration), what is the maximum possible age of the universe if H0 = 50 km/s/Mpc? 70 km/s/Mpc? 80 km/s/Mpc?The discovery of the dark energy was a surprise because astrophysicists generally assumed that the expansion would be slowing down. Select one: True False
- How did the abundance of helium in the universe suggest the existence of the cosmic microwave background radiation?Explain the expanding Universe theory and its relationship to the Big Bang theory?If the cosmic microwave background radiation (CMBR) is the remnant of the Big Bang’s fireball, we expect to see hot and coldregions in it. What are two causes of these wrinkles in the CMBR? Are the observed temperature variations greater or less thanoriginally expected?