Explain why the universe cannot be older than the Hubble time.
Q: Estimate the age of the Universe, in years, using an outdated value of 99.90 km/s/Mpc for Hubble’s…
A: Outdated value is, 99.9 km/s/Mpc So, the age of universe is calculated as, Age= 1Outdated value
Q: Calculate the age of the universe if the Hubble constant were 65 km/s/Mpc.
A:
Q: Cite an evidence that we are living in an expanding universe.
A: The universe we are living in is expanding. This is evident from Hubble's observations in 1929. A…
Q: Describe the expanding universe theory (Big Bang Theory) based on observed astronomical evidence…
A: According to the Big Bang Theory, the universe is expanding from the state having high temperature…
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: How can astronomers view events that happened in the universe’s distant past?
A: We all know that time travel is not possible, so an astronomer can't go into the past using a time…
Q: Explain why the early universe contained only hydrogen but now contains a large variety of different…
A: Hydrogen is the simplest atom in the universe. At the beginning of the universe, when the big bang…
Q: Consider a universe in which the Hubble constant has been measured to have the value H0 = 50…
A: Hubble's law gives the idea that the universe is continuously expanding, and that galaxies are…
Q: Calculate the age of the universe if the Hubble's constant was 60 km-s¹ Mly¹.
A: Our universe is constantly expanding, It was observed by Edwin Hubble when he saw the galaxies…
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: Explain why Olbers’s paradox is not a paradox.
A: In the early history of astronomy, it was believed that the universe is static, infinite, uniform,…
Q: Suppose that we were to discover that all galaxies are actually twice as far away as we think. How…
A:
Q: Light begin an EM wave does not obey Maxwell equations. Select one: O True O False
A: Concept introduction: Maxwell's equations are a set of four partial differential equations that…
Q: b) The cosmic microwave background dates to a time when the universe was -380,000 years old, or to a…
A: Given: 380000 years ago Tr=3000 Kz=1100
Q: Consider a universe in which the Hubble constant has been measured to have the value Ho = 50…
A: Given: The measured value of the Hubble constant is H0 = 50 km / s / Mpc
Q: Calculate the Hubble time for a universe with a Hubble constant of sixty kilometers per second per…
A: Given:Hubble's constant, Ho = 60km/(s Mpc)Asked:Hubble's Time, tH = ?
Q: Calculate the age of the universe for the following Hubble's constant, 200 1... - N (d) 20 km/s/Mpc
A: As per Hubble's law, the universe is expanding. If we assume that the expansion's apparent velocity…
Q: According to the version of the Big Bang Theory without a Cosmological Constant (and without Dark…
A: Hubble's Law states that as the universe is expanding in all directions, the receding velocity of an…
Q: What was the lowest temperature for photons to be able to produce 0 particles in the early universe?…
A: Given: kT=mc2
Q: If the Hubble's constant was 100 km/s/Mpc instead of 70 km/s/Mpc what would be the estimated age of…
A: It was observed that the galaxies were moving away from us. Edwin Hubble calculated their recession…
Q: how many Galaxy are there in all?
A: The huge collection of gas, dust, and billions of stars and their stars, which are held together by…
Q: What evidence shows that the universe is flat
A: Exact shape of the universe can not be predicted.
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: If most galaxies are moving away from us, are we at the center of the universe? Why or why not?
A: Introduction: The universe encompasses everything in existence, from the smallest atom to the…
Q: Calculate the age of the universe if the Hubble's constant was 29.45 km-s¹ Mly''.
A: It is observed that the galaxies in our universe are moving away from each other. This expansion of…
Q: How does the Hubble constant relate to the age of the universe?
A: Hubble constant is defined as the proportionality constant between velocity of galaxies far from us…
Q: Summarize The Big Bang Theory and its evidence
A: Humans have been always keen on knowing how the universe came into existence. For this, they…
Q: Calculate the critical density necessary for a closed universe for two extremes of the Hubble…
A: The critical density necessary for a closed universe for two extremes of the Hubble constant. given,…
Q: What would be the critical density of matter in the universe if the value of the Hubble constant…
A:
Q: Calculate the Hubble time for a universe with a Hubble constant of 60 km-s-1-Mpc-1.
A: Edwin Hubble observed that the galaxies were moving away from us. He calculated their recession…
Q: What evidence can you cite that the expansion of the universe is accelerating?
A: It is observed that galaxies are moving away from Earth at speeds proportional to their distance.…
Q: Explain how astronomers determined that the universe is expanding.
A: In universe there are millions of stars. These stars are always moving towards Earth or away from…
Q: By what factor would the critical density of the universe today change if the Hubble constant today…
A: Understanding the critical density of the universe is pivotal in unraveling its composition. The…
Q: Was the Big Bang an explosion? Explain your answer.
A: the Big Bang wasn't an explosion that destroyed things.
Q: With the aid of one or more diagram, explain how observations of the CMB can be used to determine…
A: In a flat or zero curvature universe, Euclidean geometry applies at the very largest scales. This…
Explain why the universe cannot be older than the Hubble time.
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