The critical density of a universe is around 5×10 kg/m³. Estimate the Hubble constant for this universe.
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A: Average density of the matter in the universe ρavg=M43πd23=6Mπd2
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A: We have to Consider a universe where Big Bang nucleosynthesis produced significantly more 4He than…
Q: Calculate the critical density of our universe.
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Q: The critical mass density needed to just halt the expansion of the universe is approximately 10-26…
A: Given critical mass density needed to halt the expansion of the universe is ρcrirical = 10-26 kg/m3
Q: Critical density of a universe is found to be 6×10-27 kg/m. Estimate the value of Hubble constant.
A: It was observed that galaxies are moving away from each other and the farther they are faster they…
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: Calculate the critical density of a universe with Hubble constant of 89 km-s¹.Mpc¯¹.
A: It is observed that galaxies are moving away from each other and the farther they are faster they…
Q: The critical mass density needed to just halt the expansion of the universe is approximately 10-26…
A: Given that,The critical mass density = 10-26 kg/m3Average mass = 7 eV/c2As we know that,If m is in…
Q: Suppose that the universe were full of spherical objects, each of mass m and radius r . If the…
A: Given: Mass of one spherical ball = 4 kg radius of the one spherical ball = 0.0407 m Spherical…
Q: The mass of the neutrino plays an important role in the universe. Suppose the mass of two neutrinos…
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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: Estimate the critical density of the universe if the Hubble's constant was 100 km/s/Mpc.
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Q: Use the Friedmann equations to show that the deceleration parameter go and the density parameter N…
A: According to Dark energy and the cosmological constant, the acceleration of the scale factor is…
Q: Estimate the critical density of the universe if the Hubble's constant was 50 km/s/Mpc.
A: The minimum density that is required to stop the expansion of the universe is defined as the…
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: Using Ho = = 20.8 km/s/Mly and assuming the expansion rate has been constant, find out how long the…
A: It is observed that the galaxies in our universe are moving away from each other. This expansion of…
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: If the mass density of the universe is above the critical density as it appears to be with the mass…
A: Given, The mass density of the universe is above the critical density.
Q: Explain why the universe cannot be older than the Hubble time.
A: Given: To explain universe is not older than the Hubble time as,
Q: What would be the critical density of matter in the universe if the value of the Hubble constant…
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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: Calculate the Hubble constant for a universe which is 10 billion years old.
A: As per Hubble's law, the universe is expanding and the velocity of recession of a galaxy is…
Q: The visible section of the Universe is a sphere centered on the bridge of your nose, with radius…
A: a) The visible thing is very limited to the universe's finite age and light's speed. Time is less…
Q: Calculate the Hubble constant for a universe that is 20 billion years old.
A: Hubble time is the time taken for a universe to reach its current state after it was created.…
Q: Calculate the critical density of a universe with H0 of 55 km/s/Mpc.
A: Critical density is the average density of matter required that is required to halt the expansion of…
Q: Compute the critical density of the universe using the universal gravitational constant G=…
A: The critical density of the universe can be calculated as below,
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