Pretend that galaxies are spaced evenly, 8.0 Mpc apart, and the average mass of a galaxy is 1.0 ✕ 1011 M. What is the average density (in kg/m3) of matter in the universe? Which model universe does this density value support?

Q: Pretend that galaxies are spaced evenly, 4.0 Mpc apart, and the average mass of a galaxy is 1.0 x…

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Q: critical density

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Q: In the deep space between galaxies, the density of atoms is as low as 106 atoms/m3, and the…

A: To determine,Part aThe pressure in the Pa.part bWhat volume (in m3) is occupied by 5 mol of gas.part…

Q: The nuclei of some galaxics are thought to contain supermassive black holes with M = 3 x 10°M9. How…

A: The Schwarzschild radius of a supermassive black hole can be estimated using an empirical…

Q: responding to a claim that the number of grains of sand was infinite, calculated that the number of…

A: Given information: The Archimedes estimate of the number of grains needed to fill the universe (n1)…

Q: Please answer within 90 minutes.

A: a.  b.

Q: Consider a universe where Big Bang nucleosynthesis produced significantly more 4He than 1H. Estimate…

A: We have to Consider a universe where Big Bang nucleosynthesis produced significantly more 4He than…

Q: 1. Use the energy conservation solution with = 0 and theorem in Section A.1.) of the wave equation…

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Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H0 (in km/s/Mpc)?  km/s/Mpc…

A: The question above has been given from Hubble's law. This law is also known as the Hubble-Lemaitre…

Q: A galaxy is observed receding from Earth with a speed of 2800 km/s. If the Hubble constant is 22…

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Q: why do you have to know the distance to a galaxy to find its mass?

A: The orbital motion of stars explains the masses of galaxies. The stars in a heavier galaxy exhibit…

Q: The Andromeda Galaxy is a member of the Local Group of galaxies. It is approaching us. Does this…

A: Given Andromeda galaxy is member of the local group of galaxies approaching us. Hubble law Hubble…

Q: The matter density in the Universe today is ?m=2.7×10−27kgm−3. What would be the value of the…

A: Given that the matter density in the Universe today is 2.7×10-27 kg/m3 and the Hubble constant is 38…

Q: If a galaxy is 8.6 Mpc away from Earth and recedes at 511 km/s, what is H. (in km/s/Mpc)? 59.42 v…

A: Concept:  Since Given itself in the question H∘=59.42 km/s/Mpc Hubble Time is 16500000000 Years. We…

Q: Pretend that galaxies are spaced evenly, 2.0 Mpc apart, and the average mass of a galaxy is 1.0 x…

A: We know that:-Spherical galaxy average density,ρ=M43πr23         Equation 1r=2.0 Mpcconvert Mpc to…

Q: In an empty Universe we can write PR = M = 0, 2x = 1. H² H² = (PRа+ + Ma³ + Q²₁a²²)→ H² = H₂₁²a-²…

A: Have a look dear

Q: Problem 3. Consider a flat, single component universe. 1. For a light source at redshift z that is…

A: Given a flat single-component universe.   1.)   The Hubble parameter is defined by…

Q: n. Estimate the relative velocity.

A: Given: Lo=2m L=0.75m To find: Relative velocity

Q: In the deep space between galaxies, the density of atoms is as low as 106 atoms/m3, and the…

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Q: The mass of the neutrino plays an important role in the universe. Suppose the mass of two neutrinos…

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Q: Question A7 Consider the following line element, ds² = - dt² + a² (t) (da² + dy²) + b² (t) dz²,…

A: The objective of the question is to determine whether the given line element obeys the Cosmological…

Q: The energy density ϵ in radiation is related to its temperature by ϵ=αT4. Compute the temperature…

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Q: If a galaxy is 9.1 Mpc away from Earth and recedes at 511 km/s, what is H0 (in km/s/Mpc)? 2. What…

A: Note: As per the policy, only the first question will be solved. If you want the solution for other…

Q: Explain how the Hubble constant, H0, can be used to make an estimate for the age of the Universe.…

A: Hubble's Law gives us the conclusion that the universe is always expanding.  It takes very short…

Q: Based on Figure 1 below, which galaxies are moving away from us the fastest? Velocity (km/sec) 2000…

A: first option is correct

Q: 3. Consider the following two universes: Universe I: flat, matter-dominated with no cosmological…

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Q: What is the estimated age of the Universe (in years) if the Hubble constant is 70 km/s/Mpc?

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Q: How many galaxies are there in the universe?

A: A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and…

Q: If the average density of the Universe is small compared with the critical density, the expansion of…

A: According to Hubble’s law v = HR The expression for R  is R=vΔt Thus, v=HvΔtΔt=1H Here, ∆t is the…

Q: Which of the following might you expect to be an additional consequence of the fact that galaxies…

A: Given Which of the following might you expect to be an additional consequence of the fact that…

Q: Assume the average density of the universe is 0.1 of the critical density needed for closure. What…

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Q: In the deep space between galaxies, the number density of atoms is as low as 106 atoms/m3, and the…

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Q: Use excel calculator to fill in the missing calculations. 1pc = 3.26 ly Galaxy Andromeda Large Mag.…

A: We need to complete the table in Excel. 1pc = 3.26 lyAlso, 1 ly=9.461e+12 km

Q: What would be your estimate for the age of the universe if you measured Hubbleʹs constant to be 33…

A: We are given the value of Hubble constant. We are to find the age of universe. We are also given the…