When do cosmologists think the universe began?
Q: When was universe was created
A: Big Bang theory: This give the information about how universe began. According to Big Bang theory "…
Q: Calculate the age of the universe if the Hubble constant were 65 km/s/Mpc.
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Q: How would I calculate the age of the universe in billions of years from the Hubble constant (73.48…
A: Everything that exists resides in the universe, including the Earth, planets, stars, space, and…
Q: What do you mean by leptons?
A: Leptons are subatomic particles that have half spin. They respond to the gravitational force, weak…
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: We didn't specifically discuss this in class but the first stars to form from the cosmic microwave…
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Q: What would the universe look like if there was complete cemetery between matter and antimatter?
A: What would the universe look like if there was complete cemetery between matter and antimatter?
Q: What would be the Hubble constant if the universe were 18 billion years old?
A: The age of universe is given as, t = 18 billion years (or) t = 18×109 years TO DETERMINE: The…
Q: What are cosmic rays primarily composed of?
A: Cosmic rays are energetic, subatomic particles that arrive from outside the Earth's atmosphere.
Q: Scientific models are often built in stages or layers, starting with a single idea. Which idea…
A: The Big Bang is a cosmological model of the observable universe that describes how the cosmos…
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: given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years)…
A: Given: a (distance to center of galaxy in AU) = 1,717,914,439 AU P (suns orbital period in years) =…
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: cceptable theoryaboutthe origin of the formation of universe and what does it state about the…
A: The widely accepted theory for the origin and evolution of the universe is the Big Bang model,…
Q: How the universe expands?
A: The expansion of the universe is just the increase in distance between any two selected…
Q: The expansion age of the universe is about _________ a) 1 billion years b) 10 billion years c)…
A: To find: The expansion age of the universe is about
Q: Calculate the age of the universe when its temperature was 10¹¹ K.
A: The universe was once part of a singularity of very high density and temperature. All the forces and…
Q: What is the densest subsatnce in the universe?
A: At a modest temperature and pressure the most densest element on Earth surface is Osmium.
Q: How did Harlow establish the sun's position in the galaxy and the galaxy's size?
A: Given How did Harlow establish the sun's position in the galaxy and the galaxy's size, as following…
Q: What is the only thing that remains constant all over the universe
A: A constant is a quantity that is conserved with time. And and Invariant quantity is something that…
Q: What is the the steady-state theory of the universe, and why was it abandoned? What theory do we…
A: A per the Steady-State theory, the universe is always expanding but it is maintaining a constant…
Q: What does the size difference of the irregularities in the background radiation tell us about the…
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Q: Is the universe open or closed?
A: the universe as "closed," "open," or "flat," meant that the density of the universe was either so…
Q: Is Hubble's law applicable in another planet or galaxy?
A: In this question we have to answer whether the Hubble's Law is applicable in another planet or…
Q: Suppose that stars were born at random times over the last 1010 years. The rate of star formation is…
A: Given that, The total number of stars in the Milky way is N=8×1011 And the stars were born at random…
Q: Put these in order from smallest to largest Universe Galaxy Solar system Distance between earth and…
A: Here we arrange these things on the bases of their size in increasing order.
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: Why do theorists feel the universe is flat?
A: Why do theorists feel the universe is flat
Q: Why was the idea that the universe is eternal and unchanging abandoned?
A: The universe is eternal and unchanging abandoned because the universe was found to be expanding in…
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: Consider three periods in the history of the Universe: one million years after the Big Bang (age = 1…
A: In early times, the Universe was expanding at a rapid pace. Then, the rate of expansion of the…
Q: Another way of explaining a word is to enumerate the different parts of which it is made: “X…
A: The Solar system consists of our star, i.e. the Sun, and planets and heavenly bodies which are…
Q: The rate of expansion of the universe is __________ a) Decelerating b) Accelerating c) Constant…
A: B
Q: Calculate the age of the universe for the following Hubble's constant, (a) 50 km/s/MDC
A: As per Hubble's law, the universe is expanding. The recessional velocity of galaxies is directly…
Q: A radioactive isotope has a half-life of 51.5 days. What fraction of the isotope remains after 413…
A: Given that,The half-life is t1/2=51.5 daysfor the first-order reaction constant…
Q: Explain the Higher-Order Systems?
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Q: Compare the values of the number of grains of sand in all earth’s beaches with the number of stars…
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Q: D
A: Solution: The four model are as follows, Critical Accelerating Coasting Recollapsing The present…
Q: After the Big Bang the Universe expanded and cooled. What was the temperature of the Universe when…
A: All of the universe's matter and energy were once concentrated in a singularity with infinite…
When do cosmologists think the universe began?
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