his a question on Cosmology: Suppose that you have a flat universe that has matter and dark energy with wd = -2/3 & Ωd,0 =0.7 At the time when light with z = 1 was emitted from a distant galaxy what was the ratio Ɛd /Ɛm ?
Q: Find: ® l-30) O15ul lav-7ul u.V ® The angle between u and v. For © u=sj-3k ( vaitj+k
A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…
Q: 5.3 In a positively curved universe containing only matter (2, > 1, K = +1), show that the present…
A: According to the question, the universe contains only matter, where Ωo>1 the scale factor will be…
Q: Write each of the following complex numbers in the exponential form. (a) 2 cos- +i cos 3 3 을 (b) 5,…
A: a) The given equation is of the Polar form z=r(cosθ+isinθ) Therefore, r= 2 θ= π/3 We know that,…
Q: While Einstein introduced his cosmological constant to get a static universe, he was never satisfied…
A: Given that, the mass density is ρ cosmological constant is Λ=4πGρ From the Friedmann equation…
Q: Suppose the energy density of the cosmological constant is equal to the present critical density En…
A: Einstein came up with the universal or cosmological constant to balance the calculations in his…
Q: The gravitational wave source GW 170817 was used to obtain an estimate of the Hubble Constant of Ho…
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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: Because of the cosmological expansion, a particular emission from a distant galaxy has a wavelength…
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Q: Explain what is meant by the term cosmological redshift, and contrast it with the Doppler shift that…
A: A Doppler red shift is the expansion of the wavelength and decrease in the frequency when an the…
Q: Consider the energy-momentum tensor T_µν = (ρ + p) u_µ u_ν + p g_µν applied to the matter/energy…
A: Required: Consider the energy-momentum tensorT_µν = (ρ + p) u_µ u_ν + p g_µνapplied to the…
Q: Consider the following line element, ds² = -dt² + a² (t) (dx² + dy²) + b² (t) dz², where a(t) and…
A: To state whether or not the given line element obeys the Cosmologial Principle.
Q: (a) Estimate the mass of the luminous matter in the known universe, given there are 1011 galaxies,…
A: Average mass of sun is 1.989 × 1030 kg And protons in sun is 3.7×1038
Q: Describe the Einstein’s Postulates?
A: There are two possible Einstein’s Postulates,Postulate 1: All the laws of physics can be represented…
Q: 2. (I) Accelerating from rest, a top fuel race car can reach 333.2 mph (=148.9 m/s) at the end of a…
A: (2) Write the given values with suitable variables. u=0 m/sv=148.9 m/sd=402.3 m Here, u denotes the…
Q: Explain why the cosmological principle requires that H0 must have the same value everywhere in…
A: Given Explain why the cosmological principle requires that H0 must have the same value everywhere in…
Q: If a galaxy is 9.3 Mpc away from Earth and recedes at 508 km/s, what is H, (in km/s/Mpc)? 54.62…
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Q: Is it possible that Nothing can Exist, as in a vacuum? If so, what holds the matter of the universe…
A: According to present-day understanding of what is called the vacuum state or the quantum vacuum, it…
Q: The energy density ϵ in radiation is related to its temperature by ϵ=αT4. Compute the temperature…
A:
Q: Show how the Hubble constant is used to make the simplest approximation for how long ago the Big…
A: Hubble law: any two galaxies in-universe are separating from each other with velocity v, which is…
Q: Why it is 9-3I1+.. instead of adding up all of them
A: The algebraic sum of all the voltages in a closed loop is zero.
Q: The expanding universe is carrying distant objects away from each other at a rate proportional to…
A: The relation between redshift and radial velocity is z=∆λλ=1+vr/c1-vr/c-1vr=radial velocityc=speed…
Q: Why can't we see past the cosmological horizon? O The universe extends only to this horizon. O…
A: We can't see past the cosmological horizon because the only things that we saw on the night sky is…
Q: In the standard model, about when after the Big Bang did the universe become transparent to…
A: Ans is :- C
Q: Today we view the collisions between high-energy particles, why? please explain
A: we view the collisions between high-energy particles beacuse of the following reasons :-
Q: Assume that the universe has an edge. Placing yourself at that edge in a thought experiment, explain…
A: Given Assume that the universe has an edge. Placing yourself at that edge in a thought experiment,…
Q: If you find that the Hubble constant is double what we currently believe, how does this affect the…
A: Q) If you find that the Hubble constant is double what we currently believe, how does this affect…
Q: 3. Given R =-7953.8073Î – 4174.5370Ĵ – 1008.9496K km and V = 3.6460035Î – 4.9118820Ĵ –4.9193608Ê…
A:
Q: The rest wavelength of the Hα transition of atomic hydrogen is 656.3 nm (recall that 1 nm=10-9 m).…
A:
Q: a)Define the term “standard candle” as used in cosmology. b)The flux is defined asf(Dlum) =…
A:
Q: A single component universe: (a) Rewrite the scale factor for a matter dominated universe a(t) = ao…
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Q: (a) Calculate the approximate age of the universe from the average value of the Hubble constant, H0…
A:
Q: An electron in a hydrogen atom has a speed about the proton of 2.2x106 m/s. the relativistic and…
A:
Q: Briefly explain what is meant by "particle horizon" and "event horizon" in cosmology. Calculate the…
A: To explain Particle Horizon and Event Horizon
Q: If some unknown cause of red shift—such as light becoming “tired” from traveling long distances…
A:
Q: Suppose you were to try to create a proton-antiproton pair by annihilation of two very high-energy…
A: Formula to be used :Einstein's Energy EquationE=mc2Where E - energym - massc - speed of light…
Q: Please answer within 90 minutes.
A: c) Calculate the Critical Density of the Universe TodayUsing H0=68 km/s/Mpc: H0=2.20×10−18 s−1…
Q: The spectrum of the sodium atom is detected in the light from a distant galaxy. (a) If the 590.0 nm…
A: Part (a) Given: The wavelength of spectrum line is λs=590.0 nm. The shifted wavelength of spectrum…
Q: he photons that make up the cosmic microwave background were emitted about 380,000 years after the…
A: Given data, Side of the cube in today's universe = 1 m Change in the length of the universe in…
Q: For a flat universe K=0 show that the look back time (tL)is unit of the Hubble time tH. ti/th=2/3(1…
A: Look back time is how far in time we are looking. Let us denote the Hubble time as tH=1Ho Lets…
Q: Consider the following line element, ds² = -dt² + a² (t) (dx² + dy²) + b²(t) dz², where a(t) and…
A: The Cosmological Principle is a fundamental assumption in cosmology which states that the universe…
Q: What two major limitations prevent us from building high-energy accelerators that are physically…
A: Step 1 We know that synchrotron radiation is related to the acceleration of charged particles…
Q: If a proton is moving at very high speed, so that its kinetic energy is much greater than its rest…
A: 1. Given, the reaction is, p→n+π+ Since the mass of a proton is less than the sum of the mass of n…
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